[Q] phone sounds don't work topic

I have Xperia sp c5302
It don't play music in walkman
Or don't ringing when calling
And ear piece near to front camera don't work when calling
Which means i can't hear anything
But mike is working
And back speaker can play sounds when changing sounds under
Settings ->sound-> volumes
Which means phone speaker is not burned
I re flash the os but no luck
I know bit about software side
But totally noob when it comes to hardware
Can anyone help me?