Just buy it from a reputable seller and there won't be a problem. Heck, buy 2 or 3 if you're worried about it, they're very cheap.
Could someone answer this question or if you are an AT&T customer, maybe do me a favour?
I want to buy an AT&T SIM from Ebay and activate it when I get to the US. However, you know how things can get pretty scammy out there.
I came across this page on AT&T:
Could someone who has an activated AT&T SIM please enter in their ICCID and tell me if it comes up with a message like "That SIM has already been activated"?
Or, does anyone know another way to check if a SIM has been activated at AT&T? I called customer service, who said, the only way they could check is at time of activation - well, seeing as I can't just grab an AT&T SIM up here in Canada whenever I want, it would be a little too late to find out I land in the US and my SIM's ICCID is invalid.
But you know how it is-- sometimes customer service agents are just robots and only know how to do the standard things. Maybe more experienced agents have a "tool" to check for SIM ICCID validity? Should I just keep calling back until I find an experienced agent?
Thanks in advance to whoever could test this for me.
I got this message when I tried both a currently activated SIM card and a SIM card that has never been used:
Check your PMs.Originally Posted by AT&T website