Yeah I have straight talk att Sim. Make sure it's att and not T-Mobile. (Unless T-Mobile doesn't suck in your area like it does in mine). It's 45 for unlimited talk text. 3gb LTE no throttle. After 3gb it throttles to 2g speeds.
Customer service can suck. You have to know how to edit your own APN your self. But they do based on your phone number give you the right settings. I have 2 phones over 2 years with them so far. You can port your number in but if you don't pay a month you have chance of losing your number. I have auto pay and they give me discount. With taxes it's 46.75 total. Net10 is same company without Walmart as a partner like straight talk. My wife phone couldn't do picture messaging on net 10 for some reason so we went to straight talk. Been very happy.