If you have older GPRS unit that were not received with the FW version 32 from us, then please update there bootloader so that they are working properly.
The units that you received from us with the FW version 32 or newer don't need to be updated to the FW version 33 or newer and there bootloader don't need to be updated to the new version as well, because they have the new bootloader.
First update the FW version of the unit to the latest version by following this solution: GPRS2 Firmware update with Configuration tool
After you have updated the device to FW version 33 or newer you can update the bootloader.
Create a shortcut for the ConfigurationTool by right clicking with the mouse (1) and Create shortcut (2)
You can rename the created shortcut to Bootloader Update.
Right click again on the newly created shortcut (1) and Properties (2).
In the Properties we will add the bootloader parameter to the end of the target field.
Now start the Configuration Tool with the modified shortcut and you will see in the Configuration Tool an Update Bootloader tab in the end. Select this tab (1) and press the Update Bootloader button (2).
A folder selector will appear and select the proper USB disk for the RDU unit (1) and press OK (2).
After that a file selector will appear to select the Bootloader.bin binary file that contains the new Bootloader for the RDU unit and press the Open button.
You can download the Bootloader.bin and Bootloader.crc file from the attachments.
If everything works properly you should see a similar output window
If the BOOTLOADER UPDATED message appears it means that the bootloader was updated. Please disconnect and reconnect the device open the Logfile.log file and search for the log entry: "Bootloader v2.2.2 (Mar 3 2021 12:43:29) Redlib" near the end of the file. If you see this message it means that the update was successful.