I have had the n900 for several days now. I know Nokia tech support is worthless when it comes to this phone. All they want is for me to send it to them without asking me any questions.

Currently everything is working ok but phone calls. While talking on the phone, the sound of the person on the other end keeps fading in and out during the call. I am constantly asking people to repeat themselves. This happens on normal, Speaker, and bluetooth. Three different sim card. Changed mode to gsm only and 3g only, but still I cant use the phone as a phone.

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Update 01/06/2010
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I fixed the problem by reinstalling the firmware through the Nokia Updater Software. Thought it wasn't going to work since I'm running Win7x64 but managed to get the Updater to load.

Voice Quality is Excellent!