Figure 2  Select RETEVIS EZTalk 5, choose the firmware file, and tap Update

Step 6  Confirm Completion

When “Upgrade completed” appears, tap “Confirm,” then reconnect the radio in the RETEVIS app.

Part 2  Radio Firmware Update

Download Resources

Update Tool: Firmware Upgrade V1.0.0 (ZIP)  

Windows driver.: Download EZTalk 5 V1.0.00.017 (BIN) 

Update Steps

Step 1  Check the Windows Driver

If Device Manager shows “PL2303TA Does Not Support Windows 11 and Later,” install a compatible driver manually:

1. In Device Manager, expand “Ports (COM & LPT).” Right-click the PL2303 device and select “Update driver.”
2. Select “Browse my computer for drivers.” Paste the extracted driver folder path, check “Include subfolders,” then click “Let me pick from a list of available drivers on my computer.”
3. Select the compatible “Prolific USB-to-Serial Comm Port” driver (use version 3.3.5.122 [2009/7/17] when instructed), click “Next,” and finish the installation. Reconnect the cable and confirm that a COM port appears without a warning icon.

macOS Driver Installation

Install the PL2303 driver from Prolific or the Mac App Store. If macOS blocks it, go to System Settings > Privacy & Security, click “Allow,” restart the Mac, reconnect the cable, and confirm that /dev/cu.usbserial… appears in Terminal.

Linux Driver Installation

The PL2303 driver normally loads automatically. Check for /dev/ttyUSB0 with “ls /dev/ttyUSB*”. If needed, run “sudo modprobe pl2303”; for access errors, run “sudo usermod -aG dialout $USER”, then sign out and back in.

Step 2  Extract and Open the Update Tool

Extract the Firmware Upgrade ZIP file, then open Firmware Upgrade from the extracted folder.

Step 3  Connect the Cable and Enter Firmware Update Mode

Power off EZTalk 5 and connect the cable. Hold PTT + PF1, press the Power key, and release the keys when the indicator turns green.

Step 4  Select the Port, Model, and Firmware Version

Select the following settings:

• Port Selection: Select the COM port for the programming cable.
• Device Model: Select “EZTalk 5/EZTalk 65.”
• Operation Function: Select “Download Application to the Flash.”
• Upgrade Mode: Select “Online Upgrade.”
• Firmware Version: Select the required EZTalk 5 version0.00.017.

Figure 5  Example settings in Firmware Upgrade

Step 5  Start the Update

Select the agreement checkbox, then click “Start upgrading.” Do not disconnect the cable or close the program.

Step 6  Confirm Completion

When “Download firmware successfully” appears, close the message and wait for the radio to restart.

 

Figure 6  “Download firmware successfully” confirms a successful radio firmware update

Step 7  Verify the Version and Test the Radio

Reconnect the radio in the RETEVIS app, check the firmware version.

If the Update Fails

Check the COM port and cable driver, enter firmware update mode again, and retry. Never use firmware for another model.