Some advice for i-smartphone users:
- when the 3G or EDGE icon disappear from iPhone, You can start calls, send sms, etc, but call receiving doesn't work. Solution: take out your sim card and i-smartphone, insert both in a normal phone, make a call (I usually call my voicemail) After that, You can put back the sim and the i-smartphone to iPhone.
- 2.2 update: DO NOT UPDATE your iPhone with official update via iTunes!!! You will receive NOSERVICE message, You can't use the i-smartphone. In 2.2 update is a baseband update too, so it will kill your i-smartphone (Virgin, TurboSIM, etc) card!!!
- If you updated accidentally updated via iTunes official update, You have a brick. You can wait for new version of i-smartphone.
- the only working solution: make a custom firmware with Pwnage and update your phone with this custom firmware.