Motorola c975 has manual network selection (Menu--Networks--Available Networks) on 1900Mhz, so i can put in Cing sim and select between Cing/ATT and TM. 310-410/310-260. This is what i do everyday i switch to 310-260 once i am at home and 310-410 everywhere else. Is there any cell phone on U.S. market among major providers that has the same function???so in case when i have one bar with Cingular I would manually change to TM as i do with Mot c975. The only minus is that C975 dont get 850Mhz.