back button and keyboard

[01150612121]

Back button and keyboard don't work sometimes when i connect the handset or the charger

[Uliwooly]

Do you have an specific app running? 

Does it happen while on safe mode?

[Uliwooly]

This is how to boot on safe mode

http://talk.sonymobile.com/t5/FAQ/How-to-boot-your-phone-into-safe-mode/m-p/348008#U348008

[01150612121]

No
When i call someone

[Uliwooly]

Disable or uninstall the smartkey