[[File:flash1.png|640x419px|center|border]]
Now, open the firmware folder from the firmware zip file you downloaded and select the scatter file.Each If you selected an Android firmware package contains 2 firmware versions: , then the scatter file will be called'''Gemini_Android.txt''' can be used to flash a standard . If you selected an Android system/Linux firmware, while then the scatter file name will depend on the space you reserved for them, for example'''Gemini_Android_RootedGemini_x27_A26GB_L30GB_Multi_Boot.txt''' can be used to install a rooted Android version. You can also install a dual boot Android/Linux firmware, please refer to the [[Gemini Firmware]] to learn how to generate the scatter file.
Once you select the scatter file, the table should be populated as below:
[[File:flash2.png]]
Make sure all the partitions are found and are checked. If some partitions are not found (location tab is empty), double checked that you unzipped the Linux module in the firmware folder. Finally, change the '''Download Only''' drop down menu to''' Firmware Upgrade''' and click on the '''Download''' button. When switching between a standard Android to a dual boot Android/Linux firmware, you must use the '''Firmware Upgrade '''mode because you need to format the device and change the partitions. Connect your Gemini and restart it. . Once As soon as the Gemini is rebooted, the flash tool will detect the phone device and it will update the OS with the selected firmware. ==Manually Update Android firmware==Planet Computers provides over-the-air update for standard Android installations. For custom installation, you will need to manually update the Android firmware. To update the Android firmware, simply download the latest Android firmware from [http://support.planetcom.co.uk/index.php/Gemini_Firmware http://support.planetcom.co.uk/index.php/Gemini_Firmware] and use the '''Download Only''' option while selecting only the system partition, as in the screenshot below [[File:Screen_Shot_2018-06-20_at_15.57.55.png|640x421px|center|border]]
==Notes on flashing firmwares==
When switching between a standard Android to a dual boot Android/Linux firmware, you will need to use the '''Firmware Upgrade '''mode because you need to format the device. If you don't need to repartition the device, you can use the '''Download Only '''mode and flash a single partition without formatting. This is useful because you can update the Android system partition without deleting your data (which is stored in the user data partition), or you can update the boot.img and switching from an Android system to a rooted one or viceversa.
==Linux dual boot notes==
