I have three associates flying in for 5-7 days next week and called TMO to get the following, prepaid, pay by the day, $1.00 per day minimum, $0.10 per call/minute (so after you make first call of the day, you've automatically paid for the next 9 minutes), unlimited usage after 7 pm and unlimited TMO-TMO calls, account good for 90 days, with refills in $10, $25, $100 units.

On-line the sim activation kit is $6.99, shipping free (at a TMO store it's $9.99), maximum of two per name/credit card in any 120 day period. Bought two on-line -- includes 33 minutes air time, and can buy refills by credit card on-line.

Also, they sell above prepaid pay by the day program with mobile phone(s) - YES! Different models, anywhere from $29.99 up. I ordered a Motorola 195 just now as one of our associates' phone is only good in Asia.

You can go on-line or call 1 877 695-8465 -- beware, most CS are smart and know what they're talking about, some aren't as quick on their feet