The factory SIM unlocking of Apple iPhone 3GS is available, which means permanent unlocking of Apple iPhone 3GS is possible using the Apple iPhone server. We can unlock all Apple-iPhone easily by IMEI. There is no need to change the firmware to unlock it. iPhone unlocking is different than normal phone unlocking, as it doesn't prompt for an unlocking code after changing the SIM card. Unlocking of Apple iPhone 3GS by the Apple server is the recommended method as you will not loose the warranty of the phone. It is the fastest and most secure method to unlock the phone by IMEI. An unlocked phone can be used with all networks SIM cards around the world.
To unlock your phone, we need only 15-digits IMEI. You can find the 15-digit correct IMEI by dialing *#06# on the phone.
Unlocking of the Apple iPhone 3GS from server is a recommended method by manufacturer. Since the unlocking is done from manufacturer database, it will unlock your phone 100%.