Please refer to the attached PDFs for the step-by-step process for upgrading both communication modules.
B426-M
The latest IP Module (B426-M) FW is V3.13.208 (Download Link below):
>'Downloads'
>'Softwares'
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B450-M & B444
The latest FW for the GSM Module (B450-M) is V3.13.206 (Attached FW File):
When proceeding with a FW upgrade for the B450-M you will need to use TeraTerm. Please refer to the link below:
http://resource.boschsecurity.us/software/B450_Software_Driver_TeraTerm_all_13318644491.zip
You will need a USB-A to USB-A cable to perform the upgrade for the B450-M.
B450-M would be used with the B444 (4G Module)
&
B444 Module.