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Let's start by downloading the updated Android firmware. To do that, simply visit the Gemini Partition Tool page, select your Gemini version (Gemini x27, x25 or WIFI only) and click on the Download Base Firmware button. Make sure you select the right firmware for your Gemini.<span style="color: #252525; font-family: 'Source Sans Pro', sans-serif; font-size: 15.008px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">If you are not sure about your Gemini version, just check under Settings -> Wireless & networks. If you see a menu called SIM cards, then you have an x27 Gemini, otherwise you have an x25 Gemini.</span>
<span style="color: #252525; font-family: 'Source Sans Pro', sans-serif; font-size: 15.008px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">Once you downloaded the Base firmware, unzip it to reveal the firmware folder, for example Gemini_x27_08102018. Next, simply copy your custom scatter file into that folder. Finally, use the Flashing Tool to write the updated Android firmware on your Gemini. You can refer to the Android Flashing Guide to download and install the Flashing Tool for Windows and for Linux.<br /></span>
<span style="color: #252525; font-family: 'Source Sans Pro', sans-serif; font-size: 15.008px; font-style: normal; font-variant-ligatures: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; background-color: #ffffff; text-decoration-style: initial; text-decoration-color: initial; display: inline !important; float: none;">follow Once installed, you will need to configure it using the custom scatter file inside the Android Flashing Guide base firmware. See the following screenshot for reference<br /></span>
The most important thing here is to untick the userdata partition, which contains your data, so that your information is not deleted from the device. If you accidentally flash the userdata partition as well, then all your data will be lost. If you have acustom multi-boot Gemini as used in the screenshot, then most likely other partitions will already be unselected, this is fine.
