I need to update DTR 620

dtr620 have two computers that can not communicate, it is to be different band

Hello and welcome!

I don’t have any firmware for the DTR620 specifically. I have no idea if the DTR650 firmware would work with the 620.
If they’re like the 650, there are no different “bands”, just channels.

Have you tried a factory reset?

[ol]
[li]Turn the radio on[/li]nr[li]Hold the Home key and press the PTT button three times[/li]nr[li]Release all keys[/li]nr[li]Press the Down, Up and Right Soft keys sequentially[/li]nr[li]Hold the Home key and press the PTT button three times again.[/li]nr[li]You should see the radio restart[/li][/ol]

Congratulations Andy by topic
I’m coming in forum
I’ll try something

Joao Owls