I have 1.1.2 HW unlocked, the phone was working fine for good 4 -5 weeks. Few days ago, it started to show no service. I tried to downgrade it to 1.1.1, jailbreak, upgrade with i.unlock.no method, iclarified method and ziphone. I wouldn't make it works, is there any way I can undo HW unlock, or something else I can try. Other than that the phone work 100%. please help. thx a million.