Serial number and model number are on the sticker on the front of the Grabba device When the Grabba device is connected to a phone with the Grabba demo app, you will find the firmware version, hardware version and software version at the bottom right of the app main page and the serial number and [...]
Firstly ensure the wall charger is plugged into a functioning power socket and the charge connector is properly connected into the Grabba. If so leave the Grabba on charge and wait for up to 2 hours. If the Orange charge light comes on during this period then the Grabba must have been extremely flat and [...]
Android - You can only do so on Android. Download a previous driver, connect Grabba to phone and firmware downgrade would take place. iOS - No firmware downgrade can happen on IOS devices. On IOS devices only firmware upgrades are allowed.
Android - Grabba driver on Playstore Apple - Grabba Browser or GRCatalog on the Apple App Store