Hello guys!

I have a major issue with my N900 - during a phone call the sound bounces high and low all the time. When it drops low, I can't hear the other person!!!
I have already posted about this problem and got a few responses with the same issue. Someone's mentioned that it is a known issue with the device.
I did not experience this problem before the latest update. I have experimented with calls to mobile and landline phones, using both 3G and 2.5G on T-Mobile's USA network in NYC. The sound drops on 9 calls out of 10, but there is no problem when calling to check voicemail.
I have absolutely loved my N900 from the first day I bought it, but this is just killing me! As much as I love it for all of its advantages, like awesome web browsing, I can't use it reliably as a phone and, hence, can't keep it if I won't find a solution the sound drops during calls.
Is there anybody who had this issue and has figured out a way to fix it?

It is possibly software, possibly a hardware fault, possibly an issue with your SIM card.

First step you should try and reinstall the firmware I guess... I've not done that myself so I'm not sure but I'd imagine there's an option in the updates manager.

If that fails, get T-Mobile to send you a new SIM card (not so likely to be this, but just in case).

After that I'd say send it back for a replacemnt really... I've never experienced anything remotely like you're describing and assuming the above two options fail and it is not listed as a bug in the Maemo bugzilla (ie. a genuine know issue) then it seems like a hardware sort of issue.

I hope that helps and is not just stating the obvious!

Look through here, Same problem?

Looks like could be a bug.. strange that it's haphazard on who it affects.

Yes, it's the same issue. I have also found a bug report and several other threads on the issue:

https://bugs.maemo.org/show_bug.cgi?id=6063

http://talk.maemo.org/showthread.php?t=41646

http://talk.maemo.org/showthread.php...sound+dropping