I didn't want to clutter the general OVMS installation thread with just US AT&T PayGo issues so started this here. Main thread here: OVMS Installation AT&T GoPhone SIM card for US 1) It looks like you have to go to an AT&T store (couldn't initially order plan I needed online but thinking it may be possible now) 2) Buy SIM card and ask for 10 cents/min plan. Add on the 10MB/month data plan and the 200 texts/month plan each for $5 3) If you don't have a phone you can put the SIM card in to activate it, stay in the store and have them use one of their demo phones otherwise you have to go back to the store to do this like I did when I figured out I couldn't receive text with my new PIN. 4) Important: If you want to be able to access your GoPhone account online, use your iPhone or really anything with a web browser to access Pay As You Go Online then use your new phone number (on receipt) and enter your PIN (sales person can tell you what it usually is which I think is last four of SIM card's phone number). It will then send a text to your demo phone with your new PIN number (reason why you need to stay in store to get text if you don't have a spare phone for the SIM card). Note: It appears step 4 may not be necessary as once the OVMS is installed and your account set up on the server, any unrecognized texts (your text with the new PIN) get forwarded to your phone. The APN is WAP.CINGULAR (must be all caps). It appears that username and password for network can be left blank. I did this below and it worked as well. username: your ten digit phone number for the SIM CARD ########## (no spaces or dashes) password: your 4 digit PIN (same used to log into your Paygo website) One issue is billing. AT&T only seems to let you refill in $15 increments per month (cheapest) or $25/3 months. There were some other options but the funds expired the same time basically. I called them to try and figure out what this meant saying I was only going to use $5-10 a month and I had to put in $15 per month into my account? They said after your expiration date, you have 60 days to refill your account otherwise you lose the number and I believe have to start over with a new SIM card (not sure about that though). Thanks again to the OVMS team. Also, note: It appears that if you refill your account earlier than your expiration date, the money doesn't get added to the end of your current expiration date. It simply start's the clock over from when you add the new money so you lose time actually unless you wait until right before your expiration date. Not a good system.