Preliminar questions TYT MD-UV390 380 - Original TYT Firmware

[EA5ZF]

Good morning, I'm EA5ZF Xavi with DMR-id 2146718 and I have a question before trying to install OpenGD77 on a TYT MD-UV390 walkie, which is identical to the 380 and the Retevis RT3S.
The first thing I have to do is save the adjustment parameters, I have already done that.
The second thing is to have an original firmware prepared in case there are problems, I can go back and I can't find the latest firmware.
TYT, all I find are much older versions of the one that comes with my walkie. Mine comes with V03.00 hardware and D19.13 firmware.
I have found a D19.26 or V19.26 version on Retevis, one is for CSV and the other if you choose to record audio.

The question is: Are they compatible with my walkie?

I have tried to contact TYT and they have not responded to my request for the latest version of their firmware.
Once I have this point clear, I will be able to install OpenGD77 and start working on the custom CPS.

73 & thank you
CUL on DMR

[G4EML]

The Retevis firmware will also work on the TYT radios. I believe they are identical.

TYT are poor at making firmware easily available, their website is extremely out of date. They do normally respond to emails and supply it via that route. Or some people have contacted them via their Facebook account.

Colin G4EML

[SA0BUX]

Yes, Retevis has been much better to answer mails regarding software compared to TYT.
And Retevis has most of the firmware and cps on the site even if it can be tricky to find it as those links only exist for the base product and not offerings and such.

[EA5ZF]

Hi, thanks Colin G4EML and SA0BUX for your answers.
At this point, I have already loaded the OpenGD77 firmware on the walkie and am configuring a CPS
to be able to use the TG in my area.
Thanks for the answers, they have helped me remove some of the fear of making an unknown change and
lose the walkie.
73, we hear you in DMR
EA5ZF, Xavi DMR-Id: 2146718