My GTX 800 will not transmit. When I depress the push to talk button or the call button, the screen flashes all it's numbers and icons. It will receive random transmissions from other units on the channel. This is happening with both my handhelds. I reset both units to their most basic modes. The manual does not address this issue.

Radio Communications - Midland - 20-Mile, 22-Channel FRS/GMRS 2-Way Radios with Charger...