I just bought a iphone 3gs and i'm not with att. It's asking me for a sim which i dont have. Do i need it unlock before I can use tmobile. I cant even get in the phone without att sim card.
What are you doing with a phone without a connection? A SIM is a must for the phone to boot and function. Even a dead SIM would do. But SIM has to be in it. So contact the service provider and get a connection (and SIM). Unlocking may not be required as it is a Quad and 3G phone with all the frequencies.
"cannot send mail - the sender address was invalid" I cannot figure out why I get this...
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"cannot send mail - the sender address was invalid" I cannot figure out why I get this message. My email address is correct and valid. I use the aol server but have my own domain.