[Retevis RB75 Programming]

OK.  I have good news and bad news.  The good news - I was able to program my RB75's.  The bad - It took 6 months of working with Retevis Support.  Even then I had to BUY a new cable and have them send me a new device driver.  With the new cable and the new driver the radio was programmable from both the Retevis software and chirp.  I tried all the combinations (old cable / new driver, new cable / old driver).  Nothing worked.  I had to use the new cable and the new driver.  Then everything worked as advertised.

All I can say is - don't let them off the hook.  Stick with them even if they take a long time to reply.  

BTW - I have a set of RB19P's.  They work great but don't believe the hype.  I have tried to program them with a normal USB C cable.  No way.  Have to use their cable.  

Not sure Retevis is worth the hassle. 

[RETEVIS RB75 GMRS Radio can't change Narrow to Wide Bandwidth]

Has anyone made the RB75 work with either CHIRP or their software?  So far I am drawing a blank - getting the "No response from radio".