Welcome to another tutorial about installing a ROM on your phone. Again, we’re taking advantage of the flexibility of Android to simply change your operating system by flashing different software over.
For this simple step-by-step guide, we’re going to be using a Lenovo A850 and using the Flashtool software to directly install a new ROM on the phone.
Today we’re going through the basic steps to flash any ROM dump. The ROM we’re using is the S123 Lenovo Stock ROM which includes Google apps and will allow you to install other custom ROMs later.
Before we start though, a disclaimer: by flashing over USB or installing custom ROMs, you may be voiding your warranty. We take no responsibility if your phone is damaged or bricked by following these instructions. Always backup your phone before altering its software in any way.
Initially, you need to make sure you have installed the Lenovo USB drivers. Download the drivers and the Flashtool as well as the ROM file itself. It’s important that you ensure you are using the exact version of Flashtool we’ve included here (v3.1320.0.163) as other versions might not work.
To install the drivers. Turn off the phone (don’t use the quick boot option) and take out the battery. Open up Device Manager and plug the phone in via USB – be ready to quickly right click on the device that appear and choose “Update driver”. Using the wizard, select the drivers you downloaded previously. If you are having issues, installing the drivers, use USBDview to ensure that you have deleted any existing MediaTek USB drivers that might be on your computer.
Next, unzip the ROM file and make sure you can open Flashtool on your computer. You are now ready to start following the instructions in the tutorial video below.
Embed this video:
All the downloads you need to follow this tutorial are linked here:
What ROM did your Lenovo A850 come with? Do you have a preferred ROM for the Lenovo A850? And how easy do you find installing new ROMs with the Flashtool?