Is firmware of Ultraloq U-Bolt Pro upgradable?
Yes, firmware can be upgraded via App for new improvements and features from time to time for free.
With U-tec app, you only need go to Setting > Firmware to upgrade the firmware.
Normally, Ultraloq have two firmwares, one is for the main board, one is for the Bluetooth board.
Please make sure under Bluetooth connection to do the Firmware Upgrade.