Why do you do forced firmware updates?

We are still working to stabilise the software which requires changes to the underlying messages that we use to communicate between the phone and the device. When we change these messages for various technical reasons, to make sure new functionality works correctly, it will break compatibility with older firmware. In most instances, the device will not move if you try and use the newer app with the older firmware. So, in those cases we are forcing the firmware update in order for the app and the device to be able to communicate with each other (and thus avoid a non-functional device).