I have an iphone 3gs that has an at&t sim and was able to get internet while around a wifi signal was in the apple store. Not sure why it said sim not found and how I still got the internet but as soon as I turned off wifi i got no internet. I have straight talk from walmart for service they said I need another at&t sim card for this microsoft os phone for which he admitted they had no documentation on. Are they only trying to get me to buy another at&t sim card specific to the phone as bs or are they right and what are my next steps? Please I am not a techie so please give very simple explanation Thank you!
First, thank you for your response. When you say the phone Samsung sgh-i937 will not connect using straight talk unless i got the phone unlocked through at&t? So if I walk in the store they will do that free or charge for that unlock or is that something I have to figure out using the internet. Also, I wonder who I would ask other then straight talk about the sim since they are in the business of making money I would hope at&t might know if the sim is ok or where it is straight talk they may turn there nose up? Thank you!