Been with AT&T since they were Cingular back in 2006. Have had no real issues thankfully with billing or support. I did like how when I had the Motorola Q9h and the (ironically) "Q" key broke they told me to just send the phone back, and they sent me back the newly updated model with a better form and newer Windows Mobile OS. Also they sent me the whole regular package, so I didn't just get a new phone, but also got another set of batteries and other accessories. Finally, having unlimited* data for $30/month is pretty nice in this day and age, especially once they finally get around to installing LTE in my area.