bb that use in us is locking with each company signal
it's not like in thailand so if u wanna buy it here u have to unlock it
(i think it's up to ur host parents too
cuz some of them buy a cell phone for the student to use while the student live here)
all most of cell phone that use here is a contact cell phone
that's why there is 3g and all good service here
not a top up money phone like thailand
oh one thing teenage here is texting a lot
be prepare hahha