美國cingular pay as you sim card 問題

想請問,我上年summer 係美國cingular 買左張prepaid sim card ,我今年summer 會番去美國... 唔知張sim card 重用唔用得ga ?? 係咪可以俾錢refill 番d minutes 入去就可以用??? thxthx!!
Update: 即係想問係咪張card 本身唔會好似香港個d 過左期就唔用得,even 之後refill .
1 answer 1