There have been some techniques previously to unlock iPhone 4S but it was not sufficient enough to unlock iPhone 4 or 3GS. Now, there is a new method of unlocking these devices also but it can also be a bug but can be resolved on upcoming i-OS update. People need to compromise with one thing here which quotes that this unlocking would not stay for long. However, there is similar step-by-step methodology but SIM card swapping is an integral part of the whole process. This swapping becomes more difficult because both the SIM cards will be of different sizes. For example, if one is using T-Mobile carrier then user would need to cut the iPhone SIM card to fit it in the Micro-SIM card slot.

There is one positive factor of aspiration where iPhone would not go under any kind of random functionality. User is just supposed to be a capable person who can make use of a box cutter quite effectively. However, if one does not know about its proper usage methodology then search engines can be utilized for getting information regarding SIM card resizing.

Now, all the T-mobile carrier users have to wait for completion of certain legal and proper documentation for properly making use of the unlock iPhone 4. This is required to fulfill the process of requisition from the AT&T carrier.

Afterwards, the process of iPhone 4 or iPhone 4S unlock can be completed but users need to ensure that they do not update their latest version of firmware. This is more of a bug in the software but it can be resolved in the latest 5.0.2 software update.

Unlock iPhone 4 Videos