keyboard and back button unavailable when talking to phone

[Naderh]

While I am under a phone call if I want to search the browser or sending a text message the keyboard will be unavailable so do the back button will become unavailable

[Naderh]

It worked perfectly is safe mode but how can I know what app is preventing the keyboard and back button from working

[_alexdon_]

Do you have some task killers,antivirus?

[Naderh]

I have avg antivirus

[_alexdon_]

You could uninstall it and see how it is.

[Naderh]

I will check it up later today thx

[NWK]

i tried almost everything e.g. safemode, clearing phone data but nothing works pls help

[eduard0]

check this:
/t5/Xperia-Z2/Xperia-Z2-soft-keys-keyboard-nothing-works-while-on-call/td-p/709675

[Naderh]

I found it it is the smart key application

[Naderh · Accepted solution]

When i disabled it the buttons worked perfectly

[NWK]

Guys it really worked for me try this.... go settings > Security> Power button instantly lock...... Just disable it. hopefully it will work for u guys aswell