Samsung S7500 Insert Sim Solution Ways
Samsung GT-S7500 Sim Connecter Track, Ways, Jumpers
Repair Samsung S7500 Sim Problem
In case of insert sim problem in Samsung GT-S7500 it will show insert sim, sim not valid, and may not show signal.to solve Insert Sim IC Solution Jumper Problem Ways we have to do a few simple steps as given in this post.in first step replace you sim and try it.scratch sim points in mobile slightly then try.