Hi, I have a non-unlocked iPhone 3G with the GM 3.0 firmware and I'm trying to tether it with my MacBook Air. I'm located in Germany and I'm on T-Mobile. I use a "hacked" .ipcc file to activate tethering and mms. When I pair my MBA and iPhone it works perfectly and I can choose "Connect to network" and Safari can show one page. After that the Bluetooth connection fails and the internet doesn't work anymore, of course. "Connect to network" is grayed out anymore. I can reproduce this, when I un-pair them, deactivate Bluetooth and restart both. USB tethering works like a charm. Thank you for your help!