Unlocking Instructions
When received a message from us "Unlocked"
1. Install last version of iTunes if you don't have it already (also make sure you have internet connectivity)
2. Connect phone to iTunes with not accepted (not valid) SIM card or valid (AT&T) if your phone requires activation
3. Do a backup (if needed)
4. Do a restore
5. Congratulations your Phone is now unlocked. (message should show up on ITUNES).

     Phone is now unlocked. (message should show up on ITUNES usually (if you don't see it, you can always test with a non-supported sim card). For information on backup and restore, please visit
http://support.apple.com/kb/HT1414.
Troubleshooting
:If your phone is not unlocking or getting signal, PLEASE perform the backup/restore once again (above). Sometimes it take up to 3 times to get it provisioned and unlocked. Also another solution is also trying to do another restore on another computer. Many times this has done the trick too.
What if your phone shows up as NOT ACTIVATED?
You need to use an AT&T active sim card to activate or get the last owner billing zip code & last 4 of social. Please make sure you DON'T confuse UNLOCKING with Activating it. They are two different things.
I received the message "activated" or "unlocked" but when I plug it into iTunes, nothing happens.
- Try connecting to iTunes, perform a back up then restore.
Phone is Jailbroken and will not allow me to do a restore
- You must put your iPhone into whats call "DFU mode".
- Open iTunes and connect the iPhone to your PC/Mac.
- Press and hold the Home button and the Sleep/Wake button at the same time.
- After exactly 10 seconds release the Sleep/Wake button. Continue holding the home button until you iTunes pops up a message telling you that it has detected an iPhone in recovery mode. Now you can do a restore on your iPhone.   *
Note
: It may take a few attempts to get your iPhone into DFU mode. Generally, I hold down both buttons then release the Home button just before I think the Apple logo would appear. If you are still holding both buttons down and you see the Apple logo you are holding them down for too long!
How To Unlock IPHONE METHOD 2
    1) Get an INVALID SIM card from any carriers such as (T-Mobile, Simple Mobile, etc.) and insert it into your iPhone (3G,3GS,4,4S). (*Note: iPhone 4 and 4S must be a 128k MicroSim Card to be recognize in the iPhone)
    2) Plug your iPhone along with the INVALID SIM card into your computer. (*Note: Your iTunes must be updated to the latest version)
    3) Wait a few seconds for your iPhone to be recognized in iTunes and iTunes will attempt to activate your iPhone.
    4) A message will pop up in the iTunes screen as “Invalid SIM card No Sim supported”, or a blank screen.
    5) Now, simply unplug your iPhone and insert ONLY an official AT&T Sim card into your phone.
    6) Plug your iPhone along with the official AT&T Sim card into the computer again and iTunes will attempt to activate your iPhone through the Apple Server.
    7) Once this stage has completed, you should see a screen that displays “Congratulations, your iPhone has been unlocked!”
    8) From here you have completed the factory iPhone unlock activation and you are ready to insert your other carrier’s Sim Card (T-Mobile, Simple Mobile, Etc.).
    9) Signal should show and your iPhone has been unlocked and ready to use!
Method 3 In certain circumstances the above instructions does not work to activate your unlock ticket, follow the next instructions to activate your unlock ticket using the restore method:
    1) Make sure your iPhone’s Sim Card tray is empty. (If you have an INVALID SIM Card inserted in your iPhone, you won’t be able to access iTunes to restore.)
    2) Plug your iPhone into your computer and wait until your iPhone is fully recognized in your iTunes. (*Note: Please make sure your iTunes is updated to the latest version).
    3) Click the “Restore” button and proceed with the backup and terms and agreement acceptance.
    4) Once the restore process has started, insert your INVALID SIM Card (T-Mobile, Simple Mobile, Etc.) into your iPhone.
    5) Wait for the restore process to complete and iPhone to reboot.
    6) Once your iPhone has rebooted, iTunes will activate your iPhone with your unlock ticket using your INVALID SIM Card.
    7) You should see a message displayed in iTunes, “Congratulations, your iPhone has been unlocked!”
    8-) From here you are done, you should start receiving signal from your carrier (T-Mobile, Simple Mobile, Etc.)
    9) Your iPhone is now factory unlocked permanently and you can update freely in the future for newer iOS updates.
NOTE:
This is the only "lifetime" unlock solution for Apple iPhone as the IMEI is registered as "Unlocked" in Apple database. Your phone will always be unlocked even after each new update of your phone firmware!Also at times the checker might be down and show SIM LOCKED : YES. Please ignore. If we state the phone is locked, its definitely unlocked. Most ONLINE CHECKERS are wrong since APPLE keeps making minor changes daily and it throws off checker.