I have a straight talk sim card with an att iphone but no service?

I have an Iphone 3 that was connected to AT&T and I brought the sim card for it at straight talk. Inserted the sim card and restarted my phone yesterday but still no service today. WTF? Anyone know what to do?

If their's no mention of subsidy locks it should be working. I'd call ST to make sure the SIM is provisioned correctly.

Straight talk only sells tmobile compatable sim cards. You need to unlock the iphone so it can work on the tmobile towers.

  • Will a Verizon iPhone 5 have LTE service if used on Straight Talk? Just a quick question for iPhone experts. I recently decided I want an iPhone 5 and have a friend who raves about his s3 on Straight Talk. I have the opportunity to buy a Verizon iPhone 5 from a friend for cheap, but i'd like to know if I will receive LTE service when using it on Straight Talk. If not, I will just go with a Straight Talk iPhone from their website.
  • Straight Talk is saying I have no service? I have an iPhone 5s. My service end date is supposed to be September 29th, but service/data stopped working a few days ago. Customer service is no help at all. They're telling me it's been deactivated. Why the hell would it just stop working?
  • IPhone 4 Straight Talk Sim Card I want to order a sim card for my iPhone 4, but I don't know which one to choose or if it even matters. So when I go to buy the sim it asks if it's a CDMA, unlocked GSM, AT&T compatible or T-Mobile compatible. My iPhone isn't unlocked because I heard you don't need to, and it was with AT&T beforehand, so which do I choose?
  • I have a verizon iPhone 5 & I cut down a straight talk sim to nano sim? I want to know that when you insert the SIM card in the iPhone, is it suppose to show the signal & say HOME, or just say no service, & also I have not put any minutes or active it yet because I called straight talk & told them & they said verizon iPhone five will not work, & how come some people say it does work?