Retevis RT3S is dual band DMR radio. We constantly update the RT3S firmware to meet the needs of customers. You can download it from the Ailunce website. https://www.ailunce.com/ResourceCenter/
After download, we can click the .exe to install the upgrade firmware tool.
We also find there are four firmware editions for use.
RT3S has two hardware version: GPS & Non GPS. If you radio is GPS version, you need to upgrade the GPS firmware. Otherwise, after you upgraded your radio will show white screen, snow screen, or other problems. So if you want to upgrade your RT3S firmware, make sure you choose the right firmware version first. After we know the GPS meaning, now let's learn what's the meaning CSV and REC.
RT3S supports to record function or import 120,000 contacts. but you only choose one, RT3S can't support them at the same time. That's why there are two different editions. If we think the contacts is important for us, we can upgrade the CSV firmware. If we think the record is important, we can upgrade the REC firmware.
How to upgrade the RT3S firmware, here I will show you the detailed steps.
Step 1: Connect the RT3S and computer with RT3S programming cable
Step 2: Make sure your RT3S is in the DFU mode.
Press the PTT and up side key, turn on the radio at the same time. we will see that the led is flashing red and green. It means the RT3S is in DFU mode.
Note: If the RT3S is not in the DFU mode before upgrading, you will can't upgrade successfully. Or will result white/snow screen.
Step 3: Open the RT3S Firmware upgrade.
Step 4: Click the "Open file upgrade", then selcet the new firmware .bin file.
Step 5: Click the "Download file of upgrade", It will start to upgrade.
Step 6: After it show successful. unconnect the RT3S and computer. Reboot the RT3S, we can check the current firmware version.
If you have any other questions, feel free to leave messages to us.