I am on Straight talk. Same usage as ATT and Tmobile towers combined. Kept same number, pay a lot less on usage. It is unlimited text and talk. But it isnt unlimited Data. They will start getting onto you when you go over 2GB a month. I only went over the 2nd month I had it, but since then I just use it as I need to, instead of purposely over using the Data. If you have an ATT phone already or prefer get you an unlocked phone from ebay that accepts SIM cards, go online website and order the SIM card. Plug it in and play. This plan was really designed as a bring your on phone to a carrier plan. Have not had to call customer service (YET), but here that it is a pain to talk to the foreigners on there. I use the auto refill plan, and if you hold out signing up for the auto refill 2 weeks after signing up, you will get an email offering another $2.50 off the monthly auto refill price. Other than that, good luck with your decision.