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1  Error message when trying to Read or Write from RT22. Serial port open failed, check whether serial port settings are correct. Driver downloaded and installed Prolific USB-to-Serial Comm Port (COM4) also tried COM3 and 2 Software downloaded and installed The above looks correct therefore What are the Port Settings? or is there another issue I'm getting really fed up with this, at no point did it say I had to buy additional hardware and install software to get VOX to work.
Hello Gareth, So sorry to hear that You needn't buy additional hardware and software, please download in Retevis official website,Attached a pic for you reference http://www.retevis.com/resources-center/ For usb com port, please choose the corrent communication port in computer-device manager, port is same with RT22 software For example:
2  I have a pair of h-777 and also a new pair of Rt6 radios. Is there a way to make them work together?
Hello, thank you for your question! here is a link to solve that question: http://blog.retevis.com/programme-retevis-rt24-communicate-retevis-rt5r/ pls according to detailed ways to operate. Regards
3  How do I program my new H-777 walkie talkie and is it necessary to do so? The squelch volume is too loud when interference is taking place. How do I adjust the volume?
You need to connect your radio to PC by cable , How to program it on software please read the guide here : http://blog.retevis.com/retevis-radio-frequency-programming/ . Then when you open the software , you will see just like the picture below -- There you could find the squelch levels , that's the function you need to set .And please note --
1. The higher the number is , and the stronger the ability of noise suppression is . But meanwhile it has less probability to receive the weak signal.
2. Conversely, The smaller the number is , the weaker the ability of noise suppression is , But meanwhile it is more easily to receive the weak signal.
3. A "0" level indicates that there is no squelch suppression function, which is the lowest level.
4  Where can I find an explanation of the screen symbols on my RT82, please?
What would you like do? you can programe in RT82 softeware please download RT82 usb driver and RT82 software from Retevis official website: http://www.retevis.com/resources-center/ Attached a pic for you reference:
5  hi Kam, would you be kind enough to send me a data file that I can reset my radio as I think I have opened something that has caused the screen to go blind. Radio still works but I cant see where I'm on. Adrian
Hello Adrian, Could you tell me radio model? do you want radio default frequency? Thanks Best regards
6  Hi it is possible to add other languages to voice announcement beyond english and chinese?
Sorry but no plans for now .
7  Regarding previous question (I have a pair of RT22s I need this with VOX activation with VOX earwigs but can't get it to work. How do I do this?) How do you save this action on the device?
You need a RT22 programming cable C9018A:http://www.retevis.com/2-pin-programming-cable-for-revevis-h777-baofeng-kenwood Then download RT22 usb driver and RT22 software from Retevis official website: http://www.retevis.com/resources-center/ After done, sent “vox” function in RT22 software, attached a pic for you reference
8  ESTAS NAVIDADES LE REGALARON A MI HIJA EL MODELO ( RT388 ) , Y ME GUSTARIA SABER DONDE PUEDO CONSEGUIR , O SI ME PUEDEN ENVIAR, LAS INSTRUCCIONES DEL APARATO EN ESPAÑOL. GRACIAS.
9  I recently purchased a Retevis 2 Pin PTT Mic Covert Acoustic Tube In-ear Air Acoustic Earpiece Headset off Amazon for work (were use Retevis H777 radios) but when I tried it, my audio can BARELY be heard. The sound can be heard up to the point until it connects to the acoustic tube, at which point I can hear hardly anything. I really like the style and comfort of this earpiece. What could be the problem?
This is may be the quality problems , please send mails to your Amazon sellers to ask for your warranty .