On this page, you will find the direct link to download Itel A21 Stock Firmware (flash file) from Mediafire. Firmware contains Flash Tool, Driver and instruction manual.
Itel_A21_SL601A_6.0_IN_V020.zip
How to Flash Firmware
Step 1: Download and extract the above stock firmware (flash file) on your computer.
Step 2: After extracting the firmware, you will find the Flash Tool, Driver and the instruction manual.
Step 3: Install the Provided USB Driver on your computer (skip if drivers are already installed).
Step 4: Follow the instruction manual to flash the stock firmware on your android device.
Important Notes:
[*] 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.