Hey folks. I am trying to be sneaky and get this stupid $100 a month phone bill as low as possible, all while enjoying the new Nexus4. I ordered a 99c miniSIM card from T-mobile. I ordered the Walmart 100 min/unlimited text/unlimited web card for $30. I am fully committing to my google voice number and not giving out my "real" cell phone number. I have been experimenting with VOIP Groove IP/talkatone/Simdroid and am not 100% pleased. I think at home I can live with it and frankly I will just use my computer to make any longer calls, but I do travel some and want to make sure I have at least one reliable way to get my calls out. On my current plan, I use around 150 min/month. Is there a way I can just "pay as a I go" for the extra minutes using the T-mobile pre-paid card. If I have an extra balance on my account or something? How do I set this up if it is possible? Anyone doing anything similar?