First, you need to make sure your phone is SIM unlocked. After
unlocking your phone, you can purchase an Cingular (AT&T) SIM card
on eBay. Then call 1-800-331-0500. And set up a Go Phone account.
Go Phone is owned by Cingular (AT&T) in the United States. This is a
pre-pay cell phone account that uses the Cingular (AT&T) SIM
cards. You will have several options as to how you will be billed
depending on the service you require. Pre-pay data is also available
too, for an extra fee with the Go Phone plan.
See Go Phone Plans: http://bit.ly/cIo8dG
AT&T uses the 850/1900MHz band (1900 MHz UMTS band for 3G data) for
cell phones in the US. Make sure your phone can use this bands.
If you need to SIM unlock your phone, you can do this two different
The first is to contact your service provider and inform them that you
need to have your phone SIM unlocked for international travel. Most
providers require your account to be in good standing and that you've
been their customer for a certain amount of time. Then, it's free.
The second is to purchase an unlock code. These can usually be found on
eBay for as little as $2 US.
To search for the unlock code for your phone, on eBay, type in your
phone model and the words 'unlock code' and your current service
provider. (Example: Samsung BlackJack i607 Unlock Code Rogers) Once
purchased, simply follow the instructions sent to you with the code and
unlock your phone - then use the Cingular (AT&T) SIM card with the
Go Phone pre-pay plan.
Tip: On some phones you must insert a SIM card NOT used by your current
service provider when you enter the unlock code.