I know that it is hard to find real and free unlocking solutions to such basebands as 04.11.08 and 04.12.01. These two basebands show their good protection before any unlock. More harder to find free unlock for these BB. But today I want to propose you to perform AT&T carrier unlock iPhone 4 baseband 04.11.08 and 04.12.01 running iOS 5.1.1 and use any Yes you can do it for free but there is one condition that entails more conditions. As you may guess it is AT&T factory unlock (you can find it here). This method is an old one and I had already written about it long ago. But something I missed there so here I'd try to complete this topic and help you to unlock 04.12.01 and 04.12.01 baseband on iPhone 4 iOS 5.1.1 using AT&T account. Also you if haven't it you may find it asking your friends if they have some.

If you have AT&T contract "in your hands" you can follow further. As I said before that there were several conditions before your iPhone 4 carrier unlock. So you check if everything is right before we start. Requirements

• You have to be current or former AT&T user. You can also use off-contract iPhone.
• Active AT&T customer account that includes phone or account number without any past-due amount or unpaid balance.
• The iPhone 4 can be unlocked if it used (or using) AT&T network without any violations from your side.
• AT&T account must be active for 60 days.

Who else can use this guide?

• You can use this carrier unlock 04.12.01 / 04.11.08 baseband iOS 5.1.1 tutorial if you bought your iPhone 4 in official Apple retailer and can provide settlement check.
• Active or retired military man who is AT&T customer and can confirm that.
• You can't use this guide if you reported that your iPhone 4 had been stolen or lost.

AT&T Carrier Unlock iPhone 4 BB 04.11.08 And 04.12.01 Methods

Note: Following methods are also accessible for iPhone 4S, 3GS on any baseband running iOS 5.1.1 or lower. Method 1 Use online chat to communicate with AT&T representative. For this you need to have your iPhone 4 IMEI (Setting => General => About and scroll down) then go to AT&T support page and press Chat Now to begin the process. Method 2 You can use your phone to call them for free - type this number - +18003310500 and tell that you want to unlock your iPhone. Then just follow further instructions. Method 3 If you are not living in USA or just outside this country you can use Skype to call AT&T for free using the same number - +18003310500 and do the following steps:

1. After you rack up the number above press 1 and then 0 to connect to the support team.
2. Now chose your language.
3. Say to the subscriber that you are outside the USA and want to unlock your phone. Then provide him with your iPhone IMEI and email and all other required things that he will want.
4. If everything is alright you will be provided with a case number. That's it.

Method 4 Send them email using this address - [email protected] with your unlocking request and wait for answer. Note: All 4 methods above required 2-6 days for confirmation that you have successfully carrier unlocked iPhone 4 5.1.1 baseband 04.11.08 or 04.12.01. Note: After you receive confirmation email from AT&T that your device unlocked you need to deactivate your iPhone using Redsn0w. I have to say that all these methods work. All that needed from your is your communication skills and AT&T account, of course. So try this carrier unlock on iPhone 4 5.1.1 baseband 04.11.08 or 04.12.01 and use comment section below to share you results.