Many people want to unlock their mobile phones in order to use the alternative SIM cards, usually at the end of the initial contract period or during that time. As you are aware most of the iPhone’s are “locked” to a particular network i.e. iPhone by AT&T in the US and by O2 in UK.
Most of us need to use our phones with different carriers while we are are travelling or sending our mobiles as gift to other countries, but can not use due to its locking to the native carrier. Therefore we need carrier unlock iPhone, by unlocking the iPhone you can be able to place calls with any GSM carrier by inserting different Subscriber Identity Modules (SIMs) into the phone. After iPhone is unlocked you only need to buy any local GSM-compatible SIM and put it in your iphone to make your calls hence avoiding using the iphone with roaming and paying lot for roaming charges.
I have given below the complete list of iPhone’s which are now available in the market. It is suggested to fist ensure that your iphone is unlock-able, before going for any jailbreaking or unlocking process:
You have to first jailbreak your iPhone and then you can install the unlock tool like UltraSn0w. As always instructed make a backup for your device before starting any jailbreak or unlock activity.
If you are looking for an easy iPhone 4S unlock and iPhone 4 unlock solution then this is for you. A new unlock called TP SIM has been released by ChinaSnow Dev team that you can use to unlock iphone 4S running on base band 1.0.11, 1.0.13 and 1.0.14. The unique feature of this unlock is that this does not require to jailbreak iphone 4s before unlocking it. This unlock for iPhone 4 S is called TPSIM and it works similar to the similar to Gevey Turbo SIM but it does not require an emergency call to activate the unlock as in case of Gevey SIM. Interposer Unlock for iPhone 4S baseband 1.0.11, 1.0.13 and 1.0.14 is at the pre-order stage and the availability is limited therefore if you are in desparate need of an unlock you can try TPSIM unlock. They will deliver throughout the globe once delivery starts in the last week of February 2012.