How To Enter Unlock iPhone

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Once Your IMEI Unlocked

1 Install the last version of iTunes
2 Make sure your iPhone is updated with the latest version of Firmware  (Do Not Update  IPHONE 3GS   )
3 Switch on your iPhone with an Not Accepted SIM Card
4 Connect your iPhone to your computer using the Original USB Cable
5 Launch iTunes & wait until iTunes detect your iPhone
6 Now disconnect your iPhone and reconnect it after 10 seconds.
7 Your iPhone is now Unlocked.
PS:in Case your iPhone is not unlocked just do Restore.

No Service Fix
Restart your iPhone twice without simcard and then insert simcard and try to activate your phone using WiFi
For iPhone 3GS
please if you upgrade baseband to 6.15  downgrade to 5.1  then it will active


http://support.apple.com/kb/HT5014
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