Since I have gotten my iphone 4 it has all been negative. I am currently on my 4th phone and having so many dropped calls I started to use my work phone(Sprint) to make calls. I have a Micro cell which is junk, have a new sim which did nothing and AT&T saying my phone is not a landline replacement. I believe I have held my end of the contract by paying my bill, why can't they provide me with a wireless service that works. I called and tried to cancel but it has been over 30 days since my purchase. So $305 to end my contract. So I call everyday I get a dropped call which hopefully will annoy them. Poor rep that picks up cause I'm just a jerk, and frustrated that my service is junk.