we switched not long ago from AT&T for the business phone. LOVE IT!!
Unlimited calling anywhere in the world, handles all our phone numbers, dedicated fax line, and all kinds of other cool shit costs us just under $100 a month.
The same shit with AT&T cost us
$561.97 a month without taxes. INSANITY. Oh and shared fax, no dedicated.
I love my AT&T mobile account, but the landline for business is crazy.