Tip for iPhone / AT&T users
This is mildly off-topic, but I just thought I'd give a heads up to some of the iPhone users in this thread-- you are almost assuredly eligible for a 15% discount on your monthly fees.
Go to the link below and try to find if one of your emails is eligible for the discount:
https://www.wireless.att.com/business/authenticate/
Basically, if you have an email address ending in .gov, .edu, work at a reasonably large company, etc., you can probably qualify. Many smaller businesses may also qualify. It's totally done by email, so even an alumni email ending in "duke.edu" will work.
My brother got the original iPhone shortly after it came out and is currently out of the plan window, but they still lowered his rate.
Good luck.