check out ting.com if you're okay with using sprint. they'll credit you on unused minutes that billing period. theres no contract and you can cancel anytime. use code word "rogan" for 50 bucks off an s3 or whatever phone you buy from them.

just for the record i have an iphone with a verizon contract and have nothing to do with this offer. just passing along something i've been hearing about.
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i just lock, load, and regret. - jamesn