Carrier unLock is a free Android utility and tool developed by Sergey Savchenko that helps users determine which mobile operator their iPhone is locked to. The program works by identifying the phone model number and then providing information on which network carrier the phone is locked to.

With Carrier unLock, users no longer have to rely on guesswork or contacting their carrier to find out which network their iPhone is locked to. The program is easy to use and provides accurate information on the lock status of the iPhone.

Overall, Carrier unLock is a useful tool for anyone who needs to know which mobile operator their iPhone is locked to. It's free to download and use, making it a great option for those on a budget.