Test-AC

2026.02.01: Base firmware update

We would like to inform you about the base firmware update for FMB140 starting from February, 2026. New production firmware version will be 04.02.00.Rev.05

Change description
Change type	Firmware update
Detailed description	Key improvements from last production firmware are listed in errata: FMB140 Firmware Changelog
	Old version: 04.00.00.Rev.13	New version: 04.02.00.Rev.05
Change reasons	FMB140 base firmware version update
Product release date	2026 February

Affected products
Model	Affected order codes	Order code changes
FMB140	All order codes with base firmware	New firmware version

Change impact
Risk assessment	Client's special firmware versions or order codes with special firmware will not be updated to latest base firmware automatically. During the transition period clients might receive devices with previous firmware version used in manufacture. It is not possible to downgrade devices from 04.00.00 to older version special or standard firmware.
Suggested implementation plan	If you are using special firmware version and would like an upgrade to new features of latest base firmware, please contact your Teltonika sales manager.