I am running Windows 10 OS build 10.0.10586.164. Up until just last week I could access Gmail through Microsoft Edge no problem. Now anytime I try to sign in, I immediately get an Error 400 screen. I also noticed I can\’t link Gmail to the Outlook Mail app, I get an error as soon as I sign in there as well. I then tried a third party browser and got the same thing. I can however sign into my Gmail account fine from any normal computer. I think this may have something to do with the fact that my phone completely locked up last week and I had to use the lock button + volume down button to reboot it. Everything else on the phone seems to be working correctly except for this anomaly with Gmail. Any suggestions? Thanks!
Did you turn on 2 steps verification? that can cause issues with phone browser http://support.google.com/accounts/answer/1064203?hl=en Instead of the mail app you can try adding the account via settings: settings > accounts > email and accounts And finally you can try a hard reset without restoring from a backup. Just start over and set the phone up the way you want it Btw Idoubt this has anything to do with the phone "locking up" Congrats on the first post 😀