The version of Google’s Android operating system on the Gemini PDA is extremely good at updating itself with a new version of the operating system (referred to the as the Firmware) is released. If you have rooted your Gemini however, or are dual booting the device with another operating system such as Linux, this automatic update method won’t work for you and will fail with an error telling you the partition table is incorrect. In some extreme casus, updating in this way could make your Gemini unbootable, forcing a manual reimaging of the device.
It is still possible though to install updated Android Firmware, but you need to do this manually. Planet computers release Gemini firmware on their website, with the firmware being uploaded there usually a few weeks after the OTA (Over the Air) delivery for pure Android devices.
To update the Android firmware manually, visit Settings > About phone > Firmware update as you need to change a couple of options.
The first of these is to uncheck the option for Automatic download of the firmware. You can’t install it this way in any case, and trying could cause you problems. You will also need a MicroSD card, on which you place your downloaded firmware in the root folder. With the ota.zip firmware sitting on the MicroSD card, you can now tap the Manual update button to install the latest Android firmware onto your Gemini.
One additional action you can perform is to change the Automatic detection interval to it’s maximum setting of one month. This is firstly because you can’t download and install the new firmware directly on the Gemini anyway, but also because it’s usually a few weeks after OTA that the new firmware becomes available on Planet Computers’ support website.