Iphone 4 No Service with Straight Talk?

I bought a micro sim from straight talk to use in my iPhone 4. I received the sim and activated it and had them port my number from AT&T. They said my port was complete and and my sim was active so i stuck the new one in my phone and turned it on and it said "searching… " and after a few seconds it says "No Service". I called Straight Talk and they said everything looks fine on there end, and to wait 24 hours to let the sim finsih downloading the info. To me this doesn't sound right, when i originaly got AT&T i activated it basically the same way and it worked flawless ly. I have already turned the phone off and back on probly 15 times and pulled the sim out and put it back in like 5 times. Is there any thing i can do?

Added (1). Yes i'm 100% positive i have an ATT iPhone 4… I bought it from ATT

Are you sure you have an att iphone 4?
if not and you need one email me.

The phone needs to be unlocked

Did you follow the set up instructions on StraightTalks website? Change the APN settings? It's not a "pop in the sim and go" set up. There's still things you need to do

  • 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.
  • Using straight talk service while traveling to puerto rico? Meaning make and receive phone calls?! I have a iphone with [straight talk sim] from walmart inside, will my service would work? The answer is yes, plus 3 megas download speeds, and yes puerto rico is part of the continental usa. What is straight talk for people don't know uses at&t towers I can't believe I need to answer my on question from 5 days ago if you don't know the answer don't say anything.
  • Is straight talk service up under verizon wireless? I'm buying my girlfriend an anniversary gift and it's going to be an iphone 4. Her service is with straight talk, but I found an iphone 4 on Amazon for a good price but it says it's with Verizon. Can I still get that phone without having to change her service and keeping her SIM card?
  • Is straight talk service good? With an iPhone? I've heard great stuff about straight talk but prepaid plans tend to be bad service wise. I really want to use an iPhone with them but I need to know what all I'm getting before making that investment. I live in Birmingham, AL if anyone has ST here. I heard they use AT&T towers but just need to know what all this is. Let me know what you know!