I am new to GSM cell service, having just purchased a T-Mobile pre-paid SIM. I need recommendations for a phone, since I have never had a GSM phone before and know nothing about them. I would like to stick with Motorola, as I have all sorts of accessories for them, and the phone needs to have Bluetooth. Another requirement is Quad-band compatibility. Other than that I am pretty open about what kind of features the phone has. I would like to stay below $100 for right now, as this will just be a "backup" type phone. Any suggestions?