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I use this single apn
name: Straight Talk
apn: att.mvno
proxy: leave blank
port: 80
mmsc: http://mmsc.cingular.com
mms proxy: 66.209.11.33
mms port: 80
Just like that nothing else it's been working without issues over a yr now on my inspire

If your near one of these places you can get the sims.
Straight Talk Blog: Straight Talk Automated Retail Shops

so shoot me a PM with what youd want for it and such... are you fairly certain its not connected to your package,and id be able to activate it?The automated retail shops in the link above are suppose the have the 3 card bundle packages includes at&t standard sim, at&t micro sim and a T-mobile sim from what I've read on other forums. I have none of the automated retail shop's near me so I'm just reporting what others have said. Hopefully in time one will be put somewhere near me.
if you can find the bundle on either send me the link!Hello. I use an aatt sim on samsung rugby smart throught att. my buddy uses htc inspire with an unlocked straight talk sim which they still sell online. i hope this helps you all.
) walmarts and the automated retail spots.