Hi I bought an 3s the other day and today I put the gophone sim and added the 50 to the account over the phone. When I have the sim card in it says no service. I've jailbroken the phone but have not unlocked it and I dont have a regular gophone I just went and got the sim from at&t store. Does it need to unlocked?? I'm kinda bummed out it isn't working please help...