Mr. Meissner, I think you should make sure that nitro phones are tested with networks of all major carriers in the U.S. I mean Verizon, AT&T, T-Mobile. Purchasers of your phones have a right to know which Carriers are supported before comitting to an expensive purchase. Probably just isn't good enough. And once a buyer purchases a phone from your company, i have no doubt that it cannot be returned for incompatibility with a network. This info should be on your website. It's easy to test these phones in any country especially in the U.S. You should guarantee which networks are compatible.