What to do if your Apple iPhone 12 has bad ESN or blacklisted IMEI?

Many people have iPhones but don’t know what an IMEI number is or what a bad ESN represents. Understanding how to tackle this issue can save time, money, and a headache or two. In this extensive guide, we’ll walk you through the basic mechanics of ESN and IMEI, how to check if your Apple iPhone 12 is blacklisted, and the detailed steps for unlocking a phone with a bad ESN or blacklisted IMEI.

Part 1: Basic information about IMEI number and ESN

What is IMEI number?

IMEI (International Mobile Equipment Identity): IMEI numbers are unique to GSM (Global System for Mobile Communications) and UMTS (Universal Mobile Telecommunications System) network mobile phones. Unlike ESN, an IMEI number is 15 digits long. It serves as an anti-theft measure, meaning a blacklisted IMEI can result from a device being reported lost or stolen or a breach of the consumer agreement.

What is an ESN?

Electronic Serial Number (ESN): Previously utilized by CDMA (Code Division Multiple Access) networks, an ESN was a unique identifier for cellular devices. With technological progression, most carriers have shifted their focus to the IMEI system, but knowing your ESN’s history is still crucial, especially if you’re dealing with older devices.

What is a Bad ESN?

A Bad ESN can mean a lot of things, let’s check out some examples:

If you hear this term most probably you are trying to activate the Apple iPhone 12 device with a carrier, but that’s not possible due to some reasons.
It can mean that the previous owner of the Apple iPhone 12 device switched carriers.
The previous owner had an outstanding amount on their bill and cancelled the account without paying the bill first.
The previous owner didn’t have a bill when they cancelled the account but they were still under a contract and if you cancel sooner than the due date for the contract, an “early termination fee” is created based on the remaining period of the contract and they hadn’t paid that amount.
The person that sold you the phone or someone else who was the actual owner of the Apple iPhone 12 device reported the Apple iPhone 12 device as lost or stolen.

What is a blacklisted IMEI?

Blacklisted IMEI is basically the same thing as Bad ESN but for devices that work on CDMA networks, like Verizon or Sprint. In short, the main reason that a device has a Blacklisted IMEI is so that you as the owner or someone else cannot activate the Apple iPhone 12 device on any carrier, not even the original one, thus avoiding selling or stealing the phone.

You Might Be Interested In:

Part 2: How to check if your Apple iPhone 12 is blacklisted?

In order to check if an iPhone is blacklisted, you need to first retrieve your IMEI or ESN number to check if it’s blacklisted.

How to find the IMEI or ESN numbers

On the original box of the iPhone, usually around the barcode.
In Settings, if you go to General > About, you can find the IMEI or ESN.
On some iPhones, it’s in the SIM card tray when you pull it out.
Some iPhones have it engraved on the back of the case.
If you dial *#06# on your dial pad you will get the IMEI or ESN.

How to verify if your Apple iPhone 12 is blacklisted?

Checking if your Apple iPhone 12 has a blacklisted IMEI is the first step in addressing the issue. There are several methods to do this, either via the Apple website, the network carrier, or through third-party IMEI check services.

Apple’s Blacklist Status Tool: Operating directly from Apple’s official website, entering your IMEI number can provide instant clarity on its status.
Network Carrier Services: Another way is to contact the carrier that the Apple iPhone 12 was initially sold from. Finding out is easy, just look for a logo: on the box of the iPhone, on the back case of it and even on the screen of the Apple iPhone 12 as it boots up. Just look for any carrier, Verizon, Sprint, T-Mobile, etc. Contacting your network carrier can also yield a blacklist status. Bear in mind that not all network services are equally adept or willing to communicate this information, and turnaround times may vary.
Third-Party IMEI Check Services: Utilizing third-party IMEI checkers is often the quickest method. These can be found as online services or apps, but it’s important to choose reputable sources. This is a highly recommended source to check the status of your phone because it’s quick, reliable and offers no fuss. You just go to the page, enter the IMEI or ESN, enter your contact details, and you’ll soon receive all the information you need!

Part 3: What to do if your Apple iPhone 12 has bad ESN or blacklisted IMEI?

A bad ESN or blacklisted IMEI is serious business. It can result in a device being unusable on most of the surrounding networks. If your IMEI is blacklisted, there are steps for potential resolution:

Ask the seller for a refund

If you bought the Apple iPhone 12 device with the bad ESN newly from a retailer or online shop, you might be in luck as they can provide you with a refund or at least a replacement, depending on their policy. For example, Amazon and eBay have refund policies. Unfortunately, if you got the phone from someone you found on the street, or from a seller over sources like Craigslist, this might not be possible. But there are still other things you can do.

Use it as a gaming console or iPod

Smartphones have a whole lot of functionality besides being able to place calls. You can install a bunch of different video games in it, you can use it to surf the internet, watch videos over YouTube, download music and videos to it. You could even use it as an iPod. The possibilities are really endless. You can even install apps like Skype and use Skype call as an alternative to a phone call.

Parental Control Software

#1 Rated Parental Control Software.
Monitor & Control all PC Activity!
sentrypc.com/parental-controls/ ### Report of the Issue to the Police

If you suspect fraud or a theft may have been involved, filing a report can be necessary.

Get the IMEI or ESN Cleaned

Depending on your carrier, you can see if they entertain requests to remove your IMEI from the blacklist. IMEI cleaning services exist, offering to remove the blacklisted status. However, proceed with caution, as this is often in a gray legal area.

Swap the Logic Board

The thing about a blacklisted IMEI is that it’s only blacklisted in a particular country. An unlocked AT&T iPhone blacklisted in the US would still function in Australia on another network. As such you can try and change the chips of your Apple iPhone 12. However, in doing so you should be prepared for some possible irreparable damage.

Unlock it and then Sell it

After your unlock your Apple iPhone 12 you can sell it to foreigners at a lowered rate. You can find out how to unlock in the next steps. But why would foreigners buy a blacklisted phone, you might ask? That’s because they won’t be on US soil long, and the IMEI is only blacklisted locally. So foreigners and tourists might be persuaded to buy your Apple iPhone 12 if you throw in a big enough discount.

Take it apart and sell the spare parts

You can dismember the logic board, screen, dock connector and back casing, and sell them separately. These may be used to help out other broken iPhones.

Sell internationally

As mentioned earlier, you can unlock the phone with the blacklisted IMEI. However, since it’s only blacklisted locally, you can sell it internationally where it would still have value.

Flash phone to another carrier

This is an ideal option for those who don’t mind changing carriers. You can flash the phone to another carrier, as long as they accept it, and pretty soon you’ll have a functional phone! However, in some cases, you might land with a 3G connection instead of a 4G.

Determine Hybrid GSM/CDMA Phones

If your phone cannot activate on a CDMA carrier like Verizon or Sprint, the IMEI can still be used on a GSM network. Most phones manufactured these days come with a GSM standard nano or micro sim card slot and have GSM radio enabling for a GSM network. Most of them also come factory unlocked as well.

Having a phone with bad ESN or blacklisted IMEI is naturally a headache, however, all hope isn’t lost. You can do any of the things mentioned in the previous steps, and you can read on to find out how to unlock the phone with bad ESN or blacklisted IMEI.

Part 4: How to unlock a phone with bad ESN or blacklisted IMEI?

Unlocking a phone with bad ESN or a blacklisted IMEI is not a single-step process. It involves both technological and legal maneuvering. It’s important to note that unlocking a blacklisted phone might not make it fully operational, but it can help in using it with carriers outside the country where it was blacklisted.

Understanding Lock Status

Before proceeding, ensure you understand the lock status of your phone. If the phone is network locked, it only works with a specific carrier. If it is blacklisted, it’s barred from most network use. An unlocked phone, on the other hand, is a blank slate ready to work with any carrier that supports the Apple iPhone 12 device’s technological specifications.

Steps to Unlock

Here’s a comprehensive overview of the steps to unlock a phone with a bad ESN or blacklisted IMEI:

Ascertain Legality: Ensure unlocking your phone is within the bounds of the law, both locally and globally. Legal provisions such as the Digital Millennium Copyright Act (DMCA) in the US and similar laws elsewhere define the circumstances under which phone unlocking is legal.
Contact the Carrier: If the blacklisting issue has been resolved, contacting the carrier who blacklisted the Apple iPhone 12 device is the most straightforward way to unlock it. They may require clear documentation proving ownership of the Apple iPhone 12 device and the resolution of the reason for blacklisting.
Consider Third-Party Services: If your phone was blacklisted from a carrier in a different country where unlocking might be a common practice, third-party services can assist. Verify that they are reputable and have a solid track record, as well as a range of positive reviews from previous customers.
IMEI Repair and Unlock Tools: Some advanced users may consider IMEI repair software or unlock tools. However, utilizing these services could be illegal or fraudulent unless you are a certified technician who can verify the legitimacy of the software being used and the legality of the method in your region.
Seek Professional Repair Centers: If all else fails, there are mobile repair shops that specialize in this type of work. It’s important to vet these services thoroughly, and ensure they are trained in such repairs and have a history of success.

Considerations and Warnings

Device Warranty: Unlocking a phone could void its warranty. Consider the cost-benefit of unlocking versus keeping the Apple iPhone 12 device under warranty.
Legal Ramifications: Unauthorized unlocking can have legal repercussions. It’s important to research and ensure compliance with all relevant laws.
Financial Risks: Some services come at a high cost, and there are scams in the market. Be cautious and only deal with recognized and trusted entities.

Part 5: Frequently Asked Questions

Q: Can I find out if this iPhone is reported as lost or stolen? I mean which one is it?

This information is anonymous to carriers and no one will be able to tell you exactly.

Q: I have a friend who wants to sell me an iPhone, how do I check if it has a bad ESN or if it’s lost or stolen before I buy it?

You will need to check the IMEI or ESN.

Q: I am the owner of the Apple iPhone 12 and I reported it as lost some time ago and I found it, can I cancel it?

Yes, you can but most carriers will ask you to go to a retail store with at least one valid ID.

Q: I dropped My Apple iPhone 12 and the screen cracked. Does it now have a bad ESN?

Hardware damage has no relation with an ESN. So your ESN status will remain unchanged.

Q: Is it Legal to Unlock a Phone with a Bad ESN or Blacklisted IMEI?

The legality of unlocking a phone with a bad ESN or blacklisted IMEI varies from country to country and can be influenced by specific case laws. However, in cases where the user is the original owner and the phone is paid off, it’s typically legal to unlock the Apple iPhone 12 device.

Q: Can You Use a Blacklisted Phone Internationally?

In some cases, a blacklisted phone can be used internationally. When a phone is blacklisted, it’s typically barred from the carrier network where the blacklist was applied. However, different countries have different national blacklists, so it’s possible that a phone blacklisted in one country will work in another. Unlocking the phone internationally can be an option here.

Q: Can IMEI Cleaning Really Work?

IMEI cleaning is the process by which the IMEI’s blacklisted status is removed. There are services that offer to clean your IMEI, and while some may work, it’s important to understand the legality and efficacy of such services, as it may involve fraudulent activity and your phone may still not be fully operational on some networks even after being cleaned.

Q: What Consequences Can I Face by Using a Blacklisted Phone?

Using a blacklisted phone can have various consequences. It’s unlikely to work on the network of the carrier where it was blacklisted, and the reliability of third-party carriers might be limited. Additionally, there may be legal implications, especially if the phone was blacklisted for being reported lost or stolen.

Q: Should I Buy a Phone with a Bad ESN or Blacklisted IMEI?

It’s generally not advisable to purchase a phone with a bad ESN or blacklisted IMEI, as it would be difficult to use on most networks. Such devices are often sold at lower prices, but the risks and limitations associated with them might not be worth the discount.

Conclusion

In conclusion, a phone with a bad ESN or blacklisted IMEI presents a unique set of challenges. The complexity of resolving the issue hinges on various factors including the reasons for blacklisting, the phone model, and the networks involved, among others. The best approach is often a mix of legal recourse, communication with carriers, and potentially seeking the assistance of professional technicians or legal counsel. Always research thoroughly and seek advice from reliable sources when taking the significant step of unlocking a phone with a bad ESN or blacklisted IMEI.

So now you know everything there is to know about IMEI, bad ESN, and blacklisted iPhones. You also know how to check their status using the handy Dr.Fone webpage or through contacting your carrier. And in case your Apple iPhone 12 is erroneously locked and you can’t access it, we’ve also shown you how to unlock it using the Dr.Fone - Screen Unlock (iOS) service tool.

If you have any other questions not covered in our FAQ section, please feel free to leave us a comment. We look forward to hearing from you.

How Do I SIM Unlock My Apple iPhone 12?

If your Apple iPhone 12 is locked to a particular carrier, it can be very frustrating. This is because your device will only be able to work with a SIM card from that provider and no other. This can be a problem when you want to change carriers. Some iPhones are generally easier to unlock than others, and the easiest way to unlock any iPhone is usually to use a paid online service. The issue is that these services can be very expensive.

In this article, we are going to look at how you can sim unlock your Apple iPhone 12. It is however important to note that if you purchased your device in the last one year, it is already unlocked.

Many people may wonder whether it is legal to unlock the iPhone. Actually, it is perfectly legal to unlock your Apple iPhone 12 if you have completed payments on the contract, or you bought the Apple iPhone 12 device outright. If however, you are still in the process of paying for your contract, you don’t fully own the phone and so you should contact the carrier before unlocking it.

But if your Apple iPhone 12 has bad ESN or been blacklisted by the carrier, you can check the new post here to check what to do if you have a blacklisted iPhone .

Part 1: How to SIM Unlock Your Apple iPhone 12?

There are several ways to unlock your device. Let’s look at a few of them.

1. Contact your Carrier and Have them unlock the Apple iPhone 12 device for you

This is probably the safest way to do it. If you have already completed payments on your Apple iPhone 12 or you bought it outright, you can ask your carrier for the sim network unlock pin to unlock your device. Depending on your carrier, you may have to pay for this service, and it also does take up to 7 days, sometimes more for them to get back to you.

2. Software Unlocking

This is where you download a piece of sim network unlock pin software on to your device. This software makes changes to the Apple iPhone 12 device, allowing you to make calls from any carrier. While this may sound straight-forward and easy, except it is highly risky and will not work for iPhone 4 and later models.

3. Hardware Unlocking

This is where you alter the hardware of the Apple iPhone 12 device to create an alternate path to deliver calls. Although this can be done, it also alters your device irreparably and probably also voids your warranty. Not to mention, you may pay more than $200 to have the Apple iPhone 12 device unlocked in this way.

4. IMEI unlocking

This is the best way to unlock your device and by far the easiest. This method uses your device’s IMEI number to access the IMEI database and change the status of the Apple iPhone 12 from locked to unlocked. There are very many services that you can use to IMEI unlock your device, and most of them will offer the service for a fee. But this is a great solution because there is no software to download, and you don’t mess with the hardware in any way.

Click here

### Steps on How to Unlock Your Apple iPhone 12 via IMEI

Like we mentioned before, there are a lot of services you can use to unlock your Apple iPhone 12. One of the best is iPhoneIMEI.net . This website helps you unlock the Apple iPhone 12 in an official way, and it promises that the unlocked iPhone will not be relooked again. In this tutorial, we are going to use this website to show you how easy it is to unlock your Apple iPhone 12 using your IMEI number.

Step 1: On your browser, navigate to iPhoneIMEI.net from the home page. Select your Apple iPhone 12 model and the network provider the phone is locked to. Then click on Unlock.

Step 2: Next, you will be required to enter your IMEI number and get details of the price and how long it will take for the code to be generated. Click on “Unlock Now” and you will be sent to a payment page where you can complete the payment.

Step 3. After the payment is successful, the system will send your Apple iPhone 12 IMEI to the network provider and whitelist it from Apple activation database (You will be received an email for this change). This step may take 1–5 days.

After the phone is successfully unlocked, you will get email notification too. When you see that email, just simply connect your Apple iPhone 12 to a Wi-Fi network and insert any SIM card, your Apple iPhone 12 should work instantly!

Part 2: The Best SIM Unlock Service - Dr.Fone

A SIM unlock PIN is an effective way to remove your SIM lock effectively. However, it may not work sometimes.

For instance, some network providers require only the original owner of the phone can get the code. So, if you have a second-hand contract iPhone, you can’t find the unlock PIN. If your Apple iPhone 12 is X/8(Plus)/7(Plus)/SE/6S(Plus)/6(Plus)/5S, luckily, I will introduce an amazing software to help unlock your SIM card permanently. That is Dr.Fone - Screen Unlock (iOS) .

Dr.Fone - Screen Unlock (iOS)

Fast SIM Unlock for iPhone

Supports almost all carriers, from Vodafone to Sprint.
Finish SIM unlock in just a few minutes
Provide detailed guides for users.
Fully compatible with iPhone XR\SE2\Xs\Xs Max\11 series\12 series\13series.

3981454 people have downloaded it

Click here

### How to use Dr.Fone SIM Unlock Service

Step 1. Open Dr.Fone once you have downloaded and installed it on your computer. And open “Remove SIM Locked”.

Step 2. Connect your tool to a computer with a lightning table. Start authorization verification process after press “Unlock Now”.

Step 4. After jailbreaking, the screen guides you through a series of steps. Begin by removing the SIM card from your Apple iPhone 12. Then, navigate to Settings > WLAN to access the network settings. Forget the connected Wi-Fi networks, remove all entries from the My Networks section, and disable Wi-Fi. Re-insert the SIM card and click Continue on the computer screen to proceed.

Step 5. The next subsequent screen reveals a progress window for the SIM unlocking process. After completion, click “Done” to conclude the process.

With the detailed guide, you will finish the whole process with ease. And Dr.Fone will help “Remove Setting” on your device to make sure users could use Wi-Fi as normal. Welcome to check iPhone SIM Unlock guide to know more.

safe & secure

Part 3: Popular YouTube Video for SIM Unlocking iPhone

Here is a popular video we found on YouTube, introducing how to sim unlock iPhone. Hope it will be helpful for you.

Click here

## Conclusion

As we have seen above it is not that hard to unlock your device so go ahead and unlock your Apple iPhone 12 and enjoy the benefits of an unlocked iPhone, be sure to check first if the Apple iPhone 12 device is unlocked or not. You can easily do that by inserting a SIM card from a different carrier. If it works, the Apple iPhone 12 device is unlocked. Let us know if you experience any problems with the method above.

safe & secure

How To Factory Unlock Your Telstra Apple iPhone 12

For many Australians, Telstra offers a convenient and reliable way to experience the iPhone’s innovative features. However, like most network providers, Telstra iPhones come locked, restricting their use of Telstra’s network. This might not be ideal for everyone, especially if you travel internationally, seek more competitive plans, or prefer the flexibility of switching carriers.

The good news is that unlocking your Telstra iPhone is straightforward, granting you the freedom to choose the network that best suits your needs. This guide will give you what you need to unlock Telstra iPhones and other phones. It will let you unlock your Apple iPhone 12’s full potential and navigate the exciting world of mobile network options.

Method 1: How To Unlock Apple iPhone 12 With Telstra’s Official Methods

For peace of mind and guaranteed success, unlocking your Telstra iPhone through Telstra’s official methods is the ideal choice. This straightforward approach ensures a smooth transition and adheres to carrier policies, eliminating potential complications. There are two main options offered to unlock Telstra phones.

Option 1: Freedom After Two Years

If you’ve been loyal to Telstra and maintained a phone plan for 24 months or more, congratulations! You’re entitled to unlock your Telstra phone for free. This allows you to explore other networks without any additional cost. Contact Telstra through their app or phone; their friendly representatives will guide you through the process.

Option 2: Pay as You Go

Haven’t quite reached the two-year mark yet? Don’t worry! Telstra offers a paid unlocking option based on how long you’ve been with them:

Under 6 months:$80 unlock fee
6 months to 2 years:$25 unlock fee

Remember that these fees are subject to change, so it’s always best to double-check with Telstra’s website or customer service for the latest information.

How To Request for Telstra Phone Unlock

To unlock your Telstra phone, follow the steps below using the said options. Both utilize Telstra’s official customer representative line, after all.

Step 1: Find your IMEI number. This unique 17-digit code identifies your phone. Dial *#06# on your Apple iPhone 12, or locate it on the back of the phone (if applicable) or the original box.
Step 2: Use the My Telstra app under the “Get Help” section, call 125 8887 from a Telstra phone, 13 22 00 from a non-Telstra phone, or +61 439 125 888 if you’re overseas.
Step 3: A Telstra representative will guide you through the process, explain any applicable fees, and assist you with payment if you are still within the 2-year period.

Before proceeding, it’s important to back up your phone data, as unlocking might erase it. Once complete, your Apple iPhone 12 will be network-lock-free, ready to embrace the world beyond Telstra.

While this information is current, visiting Telstra’s website or contacting their customer service for the latest fee structure and any policy updates is advisable. Also, note that this method can unlock Telstra phones other than iPhones.

Method 2: How To Unlock iPhones With a Third-Party Phone Tool [Recommended]

For those seeking a potentially faster route to unlock Telstra iPhones or those who wish to avoid opening fees, third-party phone unlocking tools like Wondershare Dr.Fone present an alternative option. However, it’s crucial to consider the potential trade-offs before venturing down this path.

A Quick Look at the Professional Phone Unlocking Tool: Wondershare Dr.Fone

Wondershare Dr.Fone is a comprehensive software suite catering to various smartphone needs, including data recovery, system repair, and device unlocking, which is relevant to our discussion. Developed by Wondershare, a reputable software company, it boasts user-friendly interfaces and compatibility with a wide range of iOS and Android devices.

Among Dr.Fone’s features lies the coveted “SIM Unlock” functionality. This tool aims to remove carrier-imposed restrictions, allowing your Telstra Apple iPhone 12 to work with other compatible networks. While seemingly convenient, it’s essential to understand the nuances before proceeding.

Dr.Fone’s SIM Unlock can bypass the carrier lock on your Apple iPhone 12, enabling it to operate with SIM cards from different networks.

How Does Dr.Fone’s SIM Unlock Work?

The steps involved in using Dr.Fone’s SIM Unlock vary depending on your Apple iPhone 12 and iOS version.. Generally, the process involves connecting your Apple iPhone 12 to your computer, selecting the “SIM Unlock” function, and following the on-screen prompts. To be more specific, follow the steps below:

Step 1: Download and install Wondershare Dr.Fone from the official website and launch it on your computer.
Step 2: On the Dr.Fone homepage, go to Toolbox > Screen Unlock > iOS. Connect your Apple iPhone 12 with the appropriate cable, too.

Step 3: You’ll see several features on the Screen Unlock module. You can explore them, but for the purpose of this guide, click Remove SIM Locked.

Step 4: Click Start when you see this page.
Step 5: The program will detect your device details. Make sure that these are correct. Once done, click Unlock Now.

Step 6: Note that you’ll need a jailbroken Apple iPhone 12 to unlock Telstra phones. Click JailBreak Guide or Watch Video to learn how.

Step 7: You’ll see several instructions on the things you need to do before unlocking your device. Follow them and click Continue.

Step 8: Dr.Fone will prompt you once the process is complete. Click Done to conclude the unlocking method. Insert a new SIM to confirm if it was successful.

Disclaimer: It’s vital to note that unlocking methods, particularly with third-party tools, may not always be successful, especially for newer iPhone models and iOS versions. Also, using third-party unlocking tools can void your phone’s warranty, leaving you responsible for any future repairs not covered by the manufacturer.

Method 3: Using Online Unlockers To Unlock Telstra iPhones

While venturing into the online realm, you might encounter websites offering remote unlocking services for a fee. These services claim to unlock your Telstra phone quickly and conveniently, often without contacting the carrier. However, approaching this method requires extreme caution due to potential risks and legal implications.

Before diving in:

**Understand the risks.**Online unlocking services operate in a gray area, potentially violating your carrier’s terms and conditions. This could lead to legal trouble or void your phone’s warranty.
**Beware of scams.**Unfortunately, not all online unlocking services are legitimate. Many are scams designed to steal your money or personal information.
**Do your research.**If you choose to proceed, thoroughly research the service provider. Read reviews from other users, check their track record, and ensure they have a good reputation.

These services typically require you to provide your phone’s IMEI number and pay a fee. They then claim to use various methods, often software or network vulnerabilities, to unlock your phone remotely. However, the success rate and security of these methods are highly questionable. Thus, relying on Dr.Fone as an alternative unlocking method is recommended.

Conclusion

Unlocking Telstra iPhones gives you network flexibility, but navigating the process requires a measured approach. Remember, while Telstra’s official methods offer a guaranteed and secure path to freedom, third-party tools like Wondershare Dr.Fone present a potential avenue for those seeking alternative solutions.

After all, Wondershare Dr.Fone remains a valuable tool for your broader phone needs. From data recovery to system repair, its diverse functionalities can enhance your mobile experience in various ways. You can use it as an all-in-one application for all your needs, from network unlocking to system repair.

Sim Unlock

What to do if your Apple iPhone 12 has bad ESN or blacklisted IMEI?