Sprint MVNO Ting.com is offering AT&T and Verizon customers a free cup of coffee (in the form of a $5 Starbuck gift card) for calculating your theoretical savings if you switched over to Ting. Be sure to account for selling your current phone, buying a new Ting-compatible phone, and any early termination fees.
You’ll have to give them your username and password and let then log into your account to check your current bill. Feel free to change your password before or afterward. Current Ting customers can get up to $10 if you “tell a friend over coffee” and upload the receipt. Via MelissaAnne of FW.