Yeah, I've had the same problem. I've had my phone for just over a month, and it started doing this. I've found that if you turn it off for a couple of minutes, then turn it back on, it's fine for about a day. But that's it so far.
If i have helped at all a click on the white star below would be nice thanks.
i have the same problem. No sound on lumia 900 whatsoever, just a crackling noise from time to time.
even on the headset i have the same problem.
The radio works fine though.
Anyone else has the same experience ?