On this page, you will find the direct link to download Xolo Q900S Plus Stock Firmware (flash file) from Mediafire. Firmware contains Flash Tool, Driver and instruction manual.
How to Flash Firmware
Step 1: Download and extract the above stock firmware (flash file) on your computer.
Step 2: After extracting you will find the Smart Phone Upgrade Tool, Driver and instruction manual.
Step 3: Install the Provided USB Driver on your computer (skip if drivers are already installed).
Step 4: Open the Smart Phone Upgrade Tool and load the firmware File from the firmware folder.
Step 5: Connect your Smartphone to the computer using the USB Driver.
[*] Before flashing the above firmware, please take a backup of your personal data. So, that you can easily restore your personal data on your Smartphone and Tablets.