I used to have ATT, but got tired of paying for both my iPhone and my sister's phone, so I canceled it. Had T-Mobile with a Windows smartphone, but the phone itself was crappy and slow so I canceled that, too.
I have Verizon (always did, even when I got ATT/T-mo, yes I carried two phones), there's like 6 or 7 lines on the account, the bill is around 180/mo, and I have an LG Dare. I hate it.