did you upgrade your phone? from Windows 8 to 8.1?
If yes, follow this step
http://windows.microsoft.com/en-us/windows/two-step-verification-faq
if cant work I suggest you reset your phone to isolate phone issue
For more details TS, I suggest contact Windows phone forum
http://www.windowsphone.com/en-us/contact-us
- Edited by britishdhez 1 hour 4 minutes ago
did you upgrade your phone? from Windows 8 to 8.1?
If yes, follow this step
http://windows.microsoft.com/en-us/windows/two-step-verification-faq
if cant work I suggest you reset your phone to isolate phone issue
For more details TS, I suggest contact Windows phone forum
http://www.windowsphone.com/en-us/contact-us
- Edited by britishdhez Thursday, April 23, 2015 6:18 AM