Just switched my phone service to TMo from Cingular after buying the Samsung T809 (happily paid the early termination fee just to be rid of Cingular's horrible service). I already had the BlackBerry 7105 from TMo and have had great service in SF, LA, Vegas, & NY with no problems. I appreciate being able to speak to a TMo customer service rep in only 1-2 minutes (Cingular leaves you on hold forever!). My service is strong in all areas of the city and the T809 & 7105 are great.