Installing Lenovo S850 Update Marshmallow ROM to your device is a great way to enjoy the latest Android version on your older device. Not all Android devices get official Marshmallow update from Google especially older Android devices. So, if your device is one of those unsupported devices, you can try this step to make your device running the latest OS. Before trying flashing this custom ROM, make sure you perform some aspects in order to make the process runs safety and smoothly.
You need to fully charge your handset or at least 80 percent of battery power before starting out. If you run out of the battery during the Lenovo S850 Update Marshmallow process, it may crash the software that may cause damage to your device. As you will wipe out the memory and data of the device, make sure you make backup of your important data on the device. You also need to enable the USB Debugging mode in order for the flashing tool to run. Before rebooting the device, wipe cache partition and wipe dalvik should be performed if the device experience bootlooping during the installation.
Lenovo S850 Update Marshmallow ROM installation Steps
Before starting the process, please download USB-driver for your device and install it on your computer. Download the right Lenovo S850 Update Marshmallow firmware and then extract it into a folder with some files in it. Now shut down your Lenovo S850 device and then connect it to your computer using USB data cable. Wait for the computer to detect your device. Next, run Device Manager and then choose the Update Driver option. Wait for the process to complete. Download a special tool called Flash_tool.exe. You can choose the latest version on the website.
Run the Flash Tool and pop up a window will appear. Choose the Scatter-Loading option and then you are asked to choose the firmware file you have downloaded and extracted before. You can automatically register the path to the target file by choosing Android_scatter.txt text document and open it. Tick the DA DL ALL WITH Cheksum checkbox. Confirm the update process by tapping the Install button. Now you can sit back and relax as the flashing process is working. Once the installation is complete, you can boot up your device. This is the first boot after the update so it will take longer to finish. Once your device starts up and the homescreen appears, you have successfully installed the Lenovo S850 Update Marshmallow ROM into your device.