DMR radios to avoid!

There has been a new trend lately of the Chinese radio manufacturers making DMR radios that don't do TDMA. TDMA is the pulsing the radio does that actually makes it transmit only half the time on the channel, allowing another user to transmit in the other half. This is what allows DMR repeaters to repeat two conversations at once. TDMA is a fundamental part of the DMR standard.

These new "DMR" radios that have only come about recently are unable to do TDMA. They are being sold in many cases as tier 2 DMR radios, which means they should be able to do TDMA to use repeaters properly, but they cannot. (See my video for an explanation of the difference between the tiers).

TYT UV8000E Dual Band 10W FM HT with crossband repeater Review

Motorola MotoTRBO XPR6550 VS XPR7550 (DP3600 VS DP4800)

Listening to new channels in the field with the TYT MD-380

Does the XPR6550 or DP3600 still make a good first DMR radio, and if not, what does?

New TYT MD-380 Firmware - Saar Edition. Overview of features video

If you're looking to buy this radio see the links below:
TYT MD-380. (Link redirects to most appropriate site for your country)
TYT MD-390. (Waterproof version) (Link redirects to most appropriate site for your country)