Please note that it is important to ensure that certain things are done before a firmware update can take place:
First, please ensure that your FoodMarble device is powered on and paired with the app
Please ensure that your device and your phone have more than 50% battery charge
Please ensure that you have a strong internet/cellular connection to avoid interruption
If the above does not work, please uninstall and reinstall the app, and try again.
If you still have no luck, please pair your device to a different phone and try updating it that way. This is a very rare issue, and I apologise for the inconvenience that this has caused you.