More info here:
Point here, is, Newer T-Mobile phones use IMS for Wi-Fi Calling, which requires GBA authentication in the SIM and special hardware.
The old kind, like on the Nexus One, was software based, and used UMA technology, like from the BlackBerry.
You'll see the rootzwiki linked to the open source versio nof this IMS implementation that T-Mobile and their vendor have released. Not totally clear if that's all you need to get Wi-Fi Calling to work.
So it would be amazing if the CM team could integrate the IMS service into the phones that support it going forward.
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.
Been scouring the forums looking for a definitive answer...yours is the best so far, so thanks! This post was made November 25th; has been any progress/hope so far? I'm very much a noob when it comes to android customization, but I have managed to install CM10 on my Nexus 4. If they do come out with a patch to enable it, will it be solely ROM dependent or will the fact that I'm on a Nexus 4 come in to play?
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