[Larry Morgan]

After resetting to factory settings 3 times, which involved re-actuating phone & re inputting contacts, apps etc.
A week later to solve Microsoft account error I installed for free "Microsoft Authenticator App" which generates codes to keep BT Wi-Fi enabled

[anon8959613]

Check ur date and time set it manually

[Larry Morgan]

It crashed grrr "Attention required" :-(

[T Moore]

Where did you read the Microsoft Authenticator App keeps stuff enabled?
I don't think so. The app causes more problems than it is worth.

[her3814]

As I know, that app generates codes for, 2 steps login enabled accounts, just say Google, outlook Facebook, whatever.. But it doesn't have Wi-Fi or Bluetooth functions.. Maybe you set your GMT wrong or your carrier is having problems with time and date auto sync...

[Larry Morgan]

Since upgrading to Nokia Lumia 635 last week I constantly got error code 80072 F06
i.e "Microsoft account requires attention", so unable to sync emails, use Apps. or Internet Explorer etc.
Resetting to original factory settings 6 times temporally resolved problem.
Contacted Vodafone customer services who sent me to a store to verify ID then told me to contact Nokia Tech Support that said to try online troubleshooter but to no avail.
Reconfigured my BT Wi-Fi connection to a "secure setting" that ultimately resolved issue.
ALL'S OK NOW :D