Hello engineers, pls i just bought a blackberry phone yesterday but i'm having network problems with it. The network frequently disappears on it, showing "no network" or "searching for network" most times.

I've tried etisalat, same problem. I tried mtn, the same problem occurred. Mtn BB plan even browses too slowly. But when i put both sims (etisalat & mtn) in my nokia phone, the network will be steady.

It's BB Torch 3 phone, model no: 9850, London used. It's a branded phone with brand name: Verizon.

Pls what is the solution to this problem? Pls help out. GOD BLESS!