nokia 8310 network problem

[mm2k4u]

i have nokia 8310 and i am facing some problem with it. the problem is like that,it only works with "AIRTEL" operator's sim card ,but when i insert any other operator(ORANGE,TRUMP,BPL,etc) sim card it don't show any network range .does anyone have solution for this .Plzzz help me out.

[browntoa]

it can be one of 2 things

1) the phone is stolen and has been blocked by those networks, in which case you can do nothing

2) the Network freqs for those other operators are not supported by your phone and agin there is nothing you can do about that (yours supports 900/1800)