My Father lost the TMobile 640 LTE and we bought an ATT Microsoft 640 Phone and its unlocked. Is it possible to download your Firmware OTA as it recognizes the SIM and i have entered the APN settings and the Microsoft Store allowed me to download the MY Tmobile App.. Can a TMobile Store Flash it to your ROM to Unlock the Band 12 and activate WiFi Calling? Shouldn't WiFI calling be native to Windows 10? I have updated my TMobile 640 to Windows 10 and everything is working except for the WiFI Calling. When will you fix the WiFI Calling.
I am thinking that by linking the phone to TMobile and adding your ROM should tell the phone to look for your carrier updates and when the new Firmware comes out it should overwrite the ATT firmware and unlock Band 12 and activate WiFI Calling. Please talk with your techs as people bring their own devices and since the ATT Lumia 640 works for TMobile then TMobile should unlock Band 12 and activate WiFI Calling to be fully functional on your network. As there was no TMo phones that I could see online that were new I believe you should be able to overwrite the Firmware when it checks for updates . As the Network Name shows TMoile and I deleted all the ATT Apps shouldn't the phone now look for TMobile Updates for Windows 10 and FIrmware?
I thought by unlocking the phone it debrands the phone from ATT and allows it to unlock Band 12 and WiFI Calling on the next Firmware Update just like on my Windows PC I can unlock features by updating to Windows 10. Could someone help me to Unlock Band 12 and add WiFI Calling? I don't want to brick my phone. I am very comfortable with installing the new Windows 10 software but other than that I don't want to Flash it myself.
Could someone at a store help me Flash It. I own the phone outright and it should be my right to unlock Band 12 and get WiFI Calling. You allow us to bring our own phones so to make it compatible there should be an easy OTA Firmware download that we can do in your App Store or at your store connecting it up to the machine.