I ran an old Iphone and was no where near impressed. AT ALL. I switched over to Verizon after having issues with At&t so that compounded problems. .
I always hear about problems with AT&T, what kind were you having? I have yet to have one complaint with the 3 years I been with them. I know there customer service is not as good as sprints but then again I don't call as much as my sister did....