I stick with at&t because of price also :)
I get 23% work discount on my voice plan, $5 discount from bundling with u-verse internet, I still have 200 sms for $5 and don't need more, old $25 2GB plan with $31 for 450 min after discount With taxes, its about $65 per month for cell phone servie with at&t. Not bad. I still have iphone 4 but I get better speeds on 3G than I used to get half year ago. Must be many people on smartphones migrating to LTE and refarming 2G to 3G that boost 3G. And recently att has expanded to more rural areas HSPA+ while T-Mobile or their affilate carriers still use 2G there.