M Dual Navigation Bar not working

[MDK]

M Dual Navigation Bar not working 

when touching on home and back button it is not responding

[Uliwooly]

could you elaborate?

[MDK]

below the screen we have home , back and recent apps buttons right?

from yesterday three buttons are not working 

[Uliwooly]

Try the basic, restart your phone 

[MDK · Accepted solution]

done and also tried reset the phone

[Uliwooly]

Repair your phone with PCC

PC Companion (PCC)

Bridge (for Mac)

Alternatives on How to backup Xperias

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

[Veeresh]

Repaired with PCC.It is still not working.

[Uliwooly]

In that case, contact your local Xperia Care

http://www.sonymobile.com/global-en/support/contact-us/