RT21 has four versions: FRS, UHF, FRS Plus battery 3000mah, MURS, so it’s very easy to choose the error version. If you bought RT21 FRS radio before, but the new order you mistake to buy RT21 UHF radio, how to make RT21 UHF work with RT21 FRS radio? Please follow me to reprogramme the RT21 UHF radio
1. you need to know RT21 FRS Frequency
Here’s the RT21 FRS frequency range with 16 channels below
2. How to make RT21 UHF to work with RT21 FRS radio
Please progrmame RT21 UHF same frequency and CTCSS/DCS as RT21 FRS to make them communicate each other
How to programme RT21 UHF?
A. please download and install USB driver under support page by this link below
https://www.retevis.com/2-pin-programming-cable-for-retevis-h777/#C9018AX1
B. please download and install RT21 software under support page by this link below
https://www.retevis.com/rt21-frs-business-radio#A9118JX1-C9034AX2
After programmed, please remember to write to the radio to save
In the whole process of programming, you need C9018A programming to connect your RT21 radio to the computer
https://www.retevis.com/2-pin-programming-cable-for-retevis-h777/#C9018AX1
If you would like to learn more about RT21 radio, there’re some articles to introduce RT21, please check this link: http://twowayradiocommunity.com/?s=RT21
If you still have questions about how to make RT21 UHF work with RT21 FRS radio, please email to us, partner@retevis.com
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