i730 question

[Isabelle C.]

ok so i have a i730 which other carriers can i use if i get it unlocked?
or can i only use nextel and boost. i heard someone say that if u unlock a boost or nextel that u can use any other phone carriers i want to kno whether its tru or not

 

[Powder Snow]

only nextel, boost, southern linc and telus in canada. that is it nothing else

 

[JosephC]

and it is already unlocked for boost. just put the sim in.