iOS 9.2 will become public sometime this fall. Apple already released two betas for developers and one public beta and the most recent version available for testing is iOS 9.2 beta 2 public beta. This is an interesting release. Even though most users cannot check the new features yet because millions of users are not public testers or devs – you should know some of the changes this next firmware should bring to AT&T subscribers.
There is no need to SIM unlock your AT&T iPhone 6 or 6s right now because of the issues with WiFi Calling support. The iOS 9.2 beta 2 update proves that Apple has enabled AT&T NumberSync option and this means that all Mac users who have the AT&T smartphone will be able to answer phone calls through WiFi right from their computer.
The previous beta solved some issues and bugs, and the second update brings some enhancements and improvements to the system. Apple is reportedly solving some issues with Safari View Controller, updates the Safari window and adds some minor changes along with supporting the AT&T NumberSync option useful for iPhone users who also have Mac or iPad and wish to receive phone calls right from the tablet or computer without connecting their smartphone [Verizon is also trying to bring WiFi calls on iOS 9 devices].
All iDevices that are supported by iOS 9 will be able to update to iOS 9.2. This includes AT&T iPhone 6s and 6s Plus which can be distantly unlocked to use SIM cards of other networks. Once being permanently unlocked you’ll be able to use T-Mobile, O2, Verizon and other U.S. and foreign carriers.
Different mobile companies are already supporting iOS 9 WiFi Calls along with AT&T, T-Mobile and other networks. This is a great option that makes it possible to stay connect and receive phone calls even if your cellular signal is poor or absent while WiFi connection is available.