Iphone 2g Problem

I have an Iphone 2g 8gig version

its having problem that it doesn't get GSM signals..NO SERVICE ISSUE

I have tried jail-breaking and unlocking many times

So i Suppose its a hardware issue

Anybody knows where can i Get it repaired?

M residing in RWP/ISB

Does MZ covers it? Are they efficient at doing jobs with iphones?