Why is my back button not working on my Samsung S4?

[AC Question]

Why is my back button not working on my samsuns s4?

I've had my samsung s4 for just over a year now, everything was working fine,but then my samsung needed an update a software update, I didn't update it because it said it could last hours so I didn't bother, this morning my phone updated itself and only lasted 20mins and everything was normal until I realised that my back button (the button on the right to the home button) wasn't working if I press it nothing happens, on the other side the options button works fine it's just the back button isn't working.I've tried rebooting,restarting,taking the battery out, changed a few options and nothing works. I don't know how or why this has happened. Does someone know how to fix this ?

 

[belodion]

Re: Why is my back button not working on my samsuns s4?

Try first a Cache Partition wipe.
Tell us what that does.

 

[Louise Harvey]

'Beledion'
That only works on samsuns s6

 

[Louise Harvey]

Try first a Cache Partition wipe.
Tell us what that does.

That only works for Samsung s6

 

[extraclass]

I had this problem and a RESTART straightened it out for me! Amazing what a RESTART will fix!

 

[Louise Harvey]

I had this problem and a RESTART straightened it out for me! Amazing what a RESTART will fix!

I have tried that but it dosent work