it happens not always, only sometimes when they cal back is ok they can hear me. I mean if I get 20 calls 4-5 of them they have to call back the other calls are fine. I do not know how I can solve this problem, have any idea how to solve this ?

I noticed that too.. I think the keypad automatically opens or shuts off when you're calling, what is weird is the part where the other end can't hear you, they've to call back again before they'll be able to hear you.. does it happens all the time? or is it just the first time it happens?

Dear Forum members,

I have Samsung galaxy mini s2 and it works fine. Sometimes
when I receive calls the other part can not hear me but when they
call the second time is fine. Each time when I finish the call (with problems)
I see the keypad in the screen but I did not open it before locking the phone.

Can someone please help me to solve this problem ?

Thank you in advance,
Best regards