Hi, I recently bought an unlocked + debranded phone off ebay- more because of the lower price than anything else. It came a few days ago and after turning it on with my sim card in, it said no netw. coverage. The sim works fine in my old phone, I've tested it. Can anyone help? (I've already sent off for new sims just in case, so don't mention getting a new sim. I'd like help to do it myself too- please try not to say "go get it repaired" as that doesn't help me.) Thanks 