TYT MD-390 GPS Troubleshooting and problem solving procedures

We recently received back a couple of TYT MD-390 radios from a user that encountered problems with his first time use of a DMR radio. The video looks at the troubleshooting steps that were taken to identify the source of the problems, and correct or solve the issues.
Note: The MD-390 can be purchased as a VHF or UHF model. It is not a dual band radio, so the VHF model cannot receive or transmit on the FRS frequencies, which are UHF. The radio in this discussion is VHF.
Video Timeline:
- 0:0 Complaints: Listing of user problems and comments to facilitate antenna base removal
- 12:50 Battery Capacity Test
- 15:30 Charger Bases
- 17:00 Map of field test site
- 17:35 Field test of radio range
- 22:50 Google Earth Flyover of Field Test area
- 23:45 Secondary Field Test, 2 landform obstructions
- 24:25 Antenna tests; standing waves
- 27:20 Antenna test, stock antenna forward power
- 27:50 Antenna test, standing wave @ 175 MHz
- 28:25 Antenna test, damaged antenna, forward and reflected power
- 29:00 Antenna test, comparing undamaged IPX6 antenna to damaged IPX6 antenna (standing wave, forward and reflected power)
- 30:30 What to look for when other radios cannot hear your radio transmitting (due to tone codes accidentally disabled in menu). How to re-enable tone codes.
- 32:45 How to determine which tuned antenna to use when your memory channel display is alpha numeric and you do not know what the frequency is, so you cannot match your color coded antenna.
- 34:30 Setting button assignments, how to setup button press to activate audible battery capacity indicator.
- 36:20 Discussion and conclusion
- 42:42 End