My friends just got AT&T iPhones from the US. They couldn’t unlock them via software because their baseband doesn’t supported. The good new is Gevey Sim can unlock unsupported baseband. My friend went with this solution. It works great but there is a problem of contact doesn’t recognize. iPhone doesn’t show the caller name, just display the caller number. Here is how I fix their iPhone.
1. Go to ” Settings/General/International/Region Format/ ” and select your region
2. Downlosds files ” com.apple.AppSupport.plist ” from here
3. Put this file at ” /private/var/mobile/Library/Preferences/”
4. Restart iPhone