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31  The HD1GPS Display Screen is not that bright , low contrast - rather dimly lit as compared to my TYT390GPS which has very good screen resolution brightness. So is there any way to improve the HD1GPS Screen Resolution Brightness?
Dear Dave, We've taken feedback to our engineer, the brightness will be changed in next firmware soon. please pay close attention to updated firmware in www.retevis.com and facebook Best regards
32  How could I reset the retevis rt388?
Dear Ana, You press 'menu' key, then turn on radio at the same time to reset RT388 plus Best regards
33  Y have a RT3, how can y change the language from chinees to Englisch, i cant do it via the menus becourse i cant understand chinees language. many thanks Daniel
Please Download usb driver and RT3 software from Retevis official website:http://www.retevis.com/resources-center/ Then choose “setting” keys, change language, finally writing the radio, attached a pic for your reference
34   i cannot get any transmission in or out when i turn the radio on it informs me of the channel then the red light comes on
Hello Kevin, If two radios can communicate with each other, keep the frequency and CTCSS same, so pls check your frequency and CTCC if it's same Brgds
35  Is there new software for the RT3 as I seen on QRZ that there is a new version of the firms-ware but when I went looking for it I could not find it anywhere. I would be happy if you could let me know if there is and where to get it. Many Thanks: Steven.
About RT3&RT8 Update Firmware ,The whole Guide please check here : http://blog.retevis.com/firmware-update-rt3-rt8/