UMA allows hand-off from wifi to cellular reception; Kineto and IMS do not. Wifi-calling gives T-Mo the widest coverage in the US, and it can also be used anywhere in the world, so long as you have a wifi connection. The big advantage it has over other VoIP wifi (voice) services is: It's free and you can use your regular cell number.
Microsoft this morning began pushing out a new OS and firmware update for some Lumia 640 and Lumia 640 XL devices. Even more interesting, this update brings some new features including one for the yet-unreleased Lumia 640 on T-Mobile.
Unlocked and regional variants of the both devices should begin to see an update waiting for them on Microsoft's servers. The OS gets bumped to version 15148, which is a rather large jump from the current 15127 found on many Lumia 640 and Lumia 640 XLs. The firmware is updated to version 15184.36xxx.
Here are the changes for the updates on both phones.
To activate Wifi calling on your new Lumia 950 XL do the following: Navigate to the settings app either via the tile or action center shortcut. Search for “Mobile” in the search bar (to avoid all the drilling down) and tap on “Mobile and Sim” or alternatively, search for ” Cellular and Sim” Choose sim settings on the “Mobile/Cellular and sim” settings page. Scroll the page until you see WiFi calling. Toggle it on. To record voice calls on your Lumia device, complete the. Nokia's Windows phones are becoming Popular day by day. If you are a Windows Phone user especially if you are using Nokia Lumia 520 and 525 then this post is for you. Here is a list of top 20 Best Apps For Nokia Lumia 520 and 525 Windows Phones Download these below mentioned Applications and make your phone more useful and smart. There are also. Wifi-calling gives T-Mo the widest coverage in the US, and it can also be used anywhere in the world, so long as you have a wifi connection. The big advantage it has over other VoIP wifi (voice) services is: It's free and you can use your regular cell number. It should be on the 810 - the T-Mo phone. I have the T-mobile 640. It had wifi calling before I upgraded to 8.1. I knew I would likely lose it when I put on windows 10. However, occasionally I notice that my dialer icon says wifi, and the wifi icon at the top of the screen has a little handset next to it (which is what it did with 8.1 to indicate wifi calling). Apr 16, 2014 Windows Phone 8.1 Wi-Fi Calling App on T-Mobile USA with Lumia 925 not working anymore. Microsoft Lumia and Nokia Lumia / Tips, tricks, and customization; Answer. I am sorry that the WiFi calling feature seems to be a casualty. There is the possibility that it is something that could be fixed by MS, and I'm sure they would try to, given.
Lumia 640 and Lumia 640 XL OS 15148 Changelog
Nokia 7.1 Wifi Calling
- Voice over LTE support enabled for selected operators.
- Native Wi-Fi calling support enabled for EE UK and T-Mobile USA (Lumia 640 Only).
- Additional improvements to stability, audio quality, Wi-Fi and cellular connectivity, national roaming, and more.
The mention of T-Mobile for the Lumia 640 is certainly attention-grabbing. Marketing for that device has been spotted in Walmart, but there has been no solid lead on when it launches.
The addition of Voice over LTE (VoLTE) is certainly a big deal for many as well. The new standard helps deliver higher quality audio, and it is commonly referred to as 'HD Voice' by many carriers. Needless to say, it is exciting to see that feature enabled on both of these new Lumias.
To check for the update, head into Settings > Phone Update > Check for Update. Reports from India and other regions have confirmed the rollout has begun, although here in the US our Cricket Lumia 640 has not received the update, so your mileage may vary.
Wifi Calling Nokia Lumia 635
Source: Microsoft; Thanks, Melwin, and Yahia, for the tips