MightyHeight

I own two Radioddity GM-30 Plus HTs. Sometimes they receive signal on every possible channel (GMRS, Ham, Airband, etc.) indicated by the green light on top, but my other HTs show nothing. So it seems like they're picking up interference of some kind, that nothing else is receiving. And it's happening on both units. When this happens, it happens for hours at a time and they're basically unusable for anything. Very frustrating. According to the "Radio Info" setting, they are: Radio: 100 Firmware: Ver 0.06 Hardware: Ver 1.30 Has anyone else experienced this? Any thoughts?