On this page, you will find the direct link to download Xolo Q900S 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 v1.5.1, Driver and instruction manual.
Step 3: Install the Provided USB Driver on your computer (skip if drivers are already installed).
Step 4: Smart Phone Upgrade Tool v1.5.1 and flash the firmware on your xolo smartphone.
[*] 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.