Some one just mentioned this to me today. Travelers Purchasing Support give you discounts on all kinds of stuff most importantly Sprint and Verizon. Google Travelers Purchasing Support or use this really long link.
http://agents.travelers.com/AgentHQPublic/AgentHQMainPage.aspx?TemplatePageId=7&ContentPageId=templatedata/AgentHQPublic/Content/data/purchasing_support/phone_service
hmmm, I'm grandfathered in at Verizon with unlimited data. Not sure if 'd take the risk.. though I do have 5 phones on my account, so the discount would nice sweet!
If you're looking for something for a phone - I have Credo.
Phone was free.
No contract required.
They offer up to $200 for buying yourself out of an existing contract.
Plans are extremely price competitive. I have just phone (includes nice camera), and it's $35 a month including taxes. I think the full plan including text, internet, unlimited - is around $60.
Uses the Sprint network.
And (something I look at) - 10% of their income is donated to organizations the users vote on every 6 months.
I've had the Sprint discount on my plan for about 4 years - Family Plan w/5 phones plus 2 other individual plans for grandma and grandpa. It's a great deal and you don't have to change anything. You can just call them and add the discount to your existing plan.