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  1. Nogitsune Micah's Avatar
    Has anyone updated their Lumia 640(Tmo version) to the latest windows 10 build? Is it still broken?

    Mine didn't work on the last build.....had to revert back to 8.1
    08-15-2015 06:32 AM
  2. Orangeblood77's Avatar
    I'd like to know the answer to this also. I need it in my house because it is basically in a dead zone.
    08-16-2015 11:38 AM
  3. Nogitsune Micah's Avatar
    I'd like to know the answer to this also. I need it in my house because it is basically in a dead zone.
    Lol test it out for us and let us know ;) haha
    08-16-2015 04:11 PM
  4. wubba's Avatar
    Yes, somebody please try this. I'm ready to buy one and would like to install Windows 10, but I need wifi calling!
    08-17-2015 07:30 AM
  5. Orangeblood77's Avatar
    Well, how hard is it to revert back to 8.1 if wifi calling doesn't work? I'm an android guy and not familiar at all with windows phones as this is my first one.
    xandros9 likes this.
    08-17-2015 01:50 PM
  6. xandros9's Avatar
    Well, how hard is it to revert back to 8.1 if wifi calling doesn't work? I'm an android guy and not familiar at all with windows phones as this is my first one.
    About as hard as installing a ROM zip on your phone.

    Plug it into your PC, download the Winodws Phone Recovery Tool, hit some buttons, wait a bit and voila. Assuming nothing goes wrong of course.
    k72 likes this.
    08-17-2015 02:25 PM
  7. BrownieSanFrijolTaco's Avatar
    Has anyone updated their Lumia 640(Tmo version) to the latest windows 10 build? Is it still broken?

    Mine didn't work on the last build.....had to revert back to 8.1
    Currently on 10512 and I can confirm that Wi-Fi Calling is still not functional. Option is there but setting to WiFi preferred does nothing, and setting to WiFi Only just turns the phone radio off. At least all APN settings are working correctly with no modification. I haven't tried seeing if they continue to work after a hard reset after upgrading to 10 (I only reset when it was on 8.1) but I probably will tonight. It's an area of concern for me, as my 925 reported incorrect APN settings after a hard reset on 10 even though settings showed everything entered correctly, which meant I had to roll back to 8.1 and reupgrade to get back data and MMS. I'll let you know if anything changes.

    EDIT: I tried the hard reset while on 10 as mentioned above but WiFi calling still doesn't work. Not necessary at all for me, but if you have bad coverage, this build is not for you. It's worth noting, however, that all APN settings work perfectly after the reset, so that's a plus. Cheers.
    Last edited by BrownieSanFrijolTaco; 08-19-2015 at 07:48 PM.
    Nogitsune Micah likes this.
    08-18-2015 09:58 PM

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