Mobile data doesn't switch on automatically when wifi is switched off after 5.1.1 upgrade

[Tasfique]

after upfating to 5.1.1 if i disable the wifi, mobile data doesn't switch on it doesn't happen everytime but most of the time. on previous updates it was fine. 

Here is a video of the problem

[Tasfique]

the only solution is airplane mode

[Uliwooly]

@Tasfique

Reinstall 5.1.1 with PCC > do NOT install any app nor update any app, don't enter any google account > test it and report back

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

http://talk.sonymobile.com/thread/36355

[Tasfique]

as u recommended i have reset my phone to factory settings with a clean install yet again the problem persists. 

[dejjan81]

I have the same problem, I try to reinstall the lollipop bat the problem is still there. How to resolve the problem?

[Boone]

Same problem, after i have installed the latest update.
I tried repairing it using pc companion but its the same

[Uliwooly]

Have you tried my suggestion?

[Tasfique]

Having the same problem, factory resetting doesn't solve the issue. THIS IS A MAJOR BUG ON 5.1.1

[Tasfique]

Fix this bug SONY!!! This is the most annoying bug! This has caused me lot of problems. Downgraded to 5.0.2

[Tasfique]

Please fix this problem, let the engineers know about this problem it is a really annoying bug.