I got a 9900 bold in january and suddenly it my mic started to not work. when in a phone conversation the caller could be heard but they couldn't hear me. I sent it into repair and just got it 2 days ago. It worked at first but after restoring my the phone to my previous stuff it didn't work again. apparently it's the softwares fault? my brother has the same phone and he didn't update his and his works fine. I have the 7.1 bundle and he has the 7.0. how do i downgrade it? is it really the softwares fault? can i fix it?

Which apps do you have installed on that 9900?

nothing, only theweathernetwork app.

It sounds like the OS bug. Upgrade to 7.1.437 and that should fix the problem. I read about this before on the other sites...