Most U.S. major networks are already offering iOS 9 WiFi calling feature for iPhone subscribers. However only AT&T got approve from the FCC to roll out this option. Still a lot of iPhone AT&T users had issues with WiFi calling support for a long while. Verizon WiFi iPhone calling needs FCC approve.
The commission likes to block WiFi calling because modern networks that offer this feature don’t offer TTY support and this is must-have these days. AT&T managed to get the waiver for launching the iOS 9 feature without teletypewriter technology. Other companies, Sprint and T-Mobile, deliver the option even without the permission and this drives rivals crazy.
Verizon didn’t dare to launch Verizon WiFi calling iPhone in U.S. after getting FCC approve.When this happens – we don’t know but subscribers who wanted to factory unlock Verizon iPhone 6s or other model in order to get WiFi calling support from other networks might want to wait a bit until the mobile carrier is granter the waiver just like AT&T has done.
Since American network AT&T started to talk publicly about other networks offering the popular iOS 9 addition without the permission granted by the FCC – the commission could soon respond and make other carriers stop offering the option unless they also introduce support for TTY.
If Verizon gets similar to AT&T approval it will be able to enable the WiFi option for all iPhone users who are running iOS 9 pretty soon. The TTY replacement the company wants to offer in the future is its RTT program however it is reportedly not ready to roll out yet.
While you are waiting for the official WiFi calling support you can use some inner Verizon applications to enjoy this option on iPhone. However the integrated option is yet to come.