You can set it up online, but you have to wait until you get to the USA to get your PIN (it's SMS'd to you during the setup process) so you can't put credit on until you get there. Some places do sell pre-activated SIM's but beware as AT&T expire SIM's very quickly now if you don't keep the money flowing (30-90 days from activation or expiry of credit as a rule, up to 365 days for $100 recharge).If I buy something like this NEW AT&T ATT SIM CARD GO PHONE (PRE-PAID) 3G | eBay
then can I just activate it online? And then go to https://www.paygonline.com/websc/index.jsp and put in some credit? Is there a minimum amount of credit that needs to be added?
Thanks!
Travel Guru, try the PM again too sorry didn't realise it was full.