sprint! great incentives to stay, and great cheapest by far internet service for phone.
to give ppl and idea, I've had sprint for 6 years and I have
$25/mo
300 min/month free
night weekend starts at 8pm
free pcs-to-pcs calls
call waiting, voicemail, yadda yadda
Also, I recently cancelled my $15/mo unlimited internet and messaging. (sprint vision).
go to the sprint users forum! each year, when you renew, you can basically get a new feature or $5 off/mo.