Home User Tutorial RT21 walkie talkies:Troubleshooting

RT21 walkie talkies:Troubleshooting

by AmazonUS

RT21:One walkie talkie can not talk with others

When we buy walkie-talkies, there are always some problems which cause one of the walkie-talkie can not work together with others(such as RT21).But how to check the problems to fix it?you can find the reasons from

the following aspects:


RT21 walkie talkies


1.Adjust volume to the Maximum,and make sure these radios are set to the same frequency and CTCSS.If it is different,it can be set by programming on Chirp and PC.


2.Please check if there is a red light when transmitting and a green light when received,


3.If the indicator light work well.You can check if they are all on the same frequency and CTCSS by programming.


4.Change channel to test if there are the voice prompt?It will help you to check if it is the issue of the microphone;Or you can use the earpiece to test.


5.If the communication distance is beyond the RT21 effective range, it will not work,too. So you can move them closer and test if there any voice can be heard.

If the walkie talkies are at the same frequency and CTCSS and within a short distance, it still can’t work, that is the problem of the product itself.you can change it.


This is a list of several common for why RT21 can not talk with others, It is not just for RT21 walkie talkie,it also help you check other walkie talkies.


Leave a Comment


Dan Sibert 11/07/2019 - 21:54

We have older RT21 radios: we purchased two newer RT21 radios, but we cannot get them to communicate with the older radios? We have tried everything in your troubleshooting manual, but they still do not communicate. The two newer radios communicate: is there something else we can try?

Cherry 17/07/2019 - 16:25

We are so sorru for this, we have updated the settings for new version, please contact with us on email to get the solutions: kam@Retevis.com

Judy 03/09/2020 - 19:46

We are using 14 of these at at our school. For some reason one of them will not turn on. The base lights up green when the walkie is not on it, however I cannot get a light on when I put a certain walkie on it. The base works for other walkies so I feel safe saying it is not the base. When I put this problem walkie onto a different base I still cannot get it to charge. So I am assuming it is the battery? I cleaned the metal connections for the battery connection and nothing has seemed to help. Any other ideas?

James 04/09/2020 - 08:23

Hello! can we know where you bought them and your order id? Please e-mail us at partner@retevis.com

Dwight David Edwards 03/02/2021 - 07:39

We use the system in our Assisted Living building, sometime the walkie will not change from one channel to another it just stays on that channel

Cherry 03/02/2021 - 14:04

hi, you mean when you switch the channel, it will not change to another channel?

MR JONATHAN R JONES 29/11/2021 - 19:12

I have a large number approx 20 radius, all have been programmed correctly. I gave a red light when transmitting and green light when receiving but absolutely no sound out of any handset. Can anyone help at all as I need to get them out to staff tomorrow, thanks for your help.

Cherry 30/11/2021 - 08:47

hi, you need to check all your radios with the same settings like frequencies and private calls.


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