Wifi Stuck after using portable hotspot function

[Sunnyman]

Can anybody help to solve this problem?  This problem started from last year end and without improvement after I recently upgraded to Android 4.1.2 with the most up-to-date software version 6.2.A.0.400.

Kindly advise.  Many thanks!!

[MarlonUk1 · Accepted solution]

try to repair your phone once more http://www.sonymobile.com/global-en/tools/update-service/

[Sunnyman]

Thank you nolramlb!

The problem is solved after the re-installation.