Here is what I was trying to establish, and I will do that by personal experience: My phone is dual band 850/1800. Cingular operates on 850 in my area. Most triband phones sold are 900/1800/1900 so if I bought one it would be useless to me in this region with my current provider. Just another stab at trying to help you troubleshoot the problem, given that you have not shared critical data in order to make it easier to do so. This is also the last idea I am equipped to suggest.