Default [Q] HTC Rhyme Network Problem

Dear All,

I had purchased used HTC Rhyme S510 B. i am facing problem that in my country i can used only one network on this set and this network is only working within the city and only one city , as when i move to out of city , mobile signal gone and when i insert the sim to another mobile. It work fine.

I am surprised that how it is happening. I check it from market but they also unable to undersand the problem.

Is there anyone who know how to solve this problem.

Waiting for positive reply.