Nexus 4 bottom key problem

[Ashish Rastogi]

I have been using this Nexus 4 Phone since 2013. Now some time bottom 3 key stop functioning. Some time it work with very hard press.
We have also reset the phone same as of factory setting but unfortunately could not settle the problem.
Need help to settle this problem.

Ashish Rastogi
+91-9818755156

 

[Ashish Rastogi]

Please respond and settle my problem