Two options from TMO:
1. phone that includes a prepaid sim account, with about 30 minutes loaded, price varies from as low as $29.99 plus tax to $89.99. I recently purchased two Motorola V195s quadband clam shell for $29.99 plus tax - had several visitors from overseas office for a one week and it worked fine.
2. prepaid sim account (w/out phone) for $6.99 on line price or $9.99 if you walk into TMO store, again comes with about 30 minutes loaded.
TMO has two prepaid plans:
1. Pay per day: $1.00 per day, $0.10 per min per call (so once you make first call, you've paid for up to 10 minutes). Good thing about this is free calls after 7 pm and free TMO-TMO.
2. Pay by minutes: you get 15% discount on refills for this plan.
Both systems the number is good for 90 days and can be extended with additional refills/top-ups.
Go to
www.t-mobile.com > plans > prepaid for complete details.