Have had both Nextel and AT&T. Nextel is great as a two way but in my area the coverage is limited to the metro area only which meant I needed another cell phone for out of town business or travel. Had AT&T... up until a year or so ago and do not have much good to say about them. For the past year I have had Sprint. I burn around a thousand minutes a month from all over town and can think of only a couple dropped calls. I have adjusted my plan several times with Sprint with no problems. I can not say that about AT&T. I will say that if/when you close your account with them get a confirmation number on your account closure... In the last year they have tried to bill me three separate times for service past my closure date and even threatened with the credit bureau....GGrrr.