Thanks Meter 7
Join Date: May 2009
Location: circa Philadelphia PA
To everybody posting "hey check out this other WiFi calling method" or some SIP type method: Please stop. Now. In fact if I could, I'd ask you to stop BEFORE you posted it.
The T-Mobile WiFi calling is MORE than just the ability to make a call to a land line: It allows you to use your existing T-Mobile number to send and receive calls and texts. The other solutions will not direct people trying to make calls to you to this number. Yes I know, there's other hoops you can jump through to redirect calling or texts or whatnot, but that's not what they want.
In addition, people saying "it's not possible" must have missed that this HAS been ported to previous ROM builds. It's just not a high priority thing as it's not a heavily used feature and is very specific to T-Mobile, so it's most likely not high on their priority list compared to making sure audio works in general.
The WiFi calling, from my understanding, is a combination of both the Android app and kernel modules to reroute everything. There might be more involved these days and there's probably lots of settings to tweak and similar code changes. But I don't think it's impossible. But PLEASE don't suggest other WiFi calling methods.