[GUIDE] How to upgrade Intex Aqua N4 to Android KitKat 4.4.2

Step 1: Download CWM Here and move to your sdcard
How to install CWM:

• Install Flashify on playstore
• Then open the Flashify
• Click Recovery image
• Choose a file
• Click File explorer
• Find your CWM in your SDcard and click it
• Then click Yup!
• Wait for loading and Done

Step 2: Download Stock ROM Here and move to your sdcard

How to install Stock ROM using CWM:

• Go to recovery (off your phone then hold power button + volume down)
• Select "wipe data/factory reset" then select "Yes -- delete all user data"
• Select "install zip from sdcard"
• Select "choose zip from sdcard"
• Find the Stock ROM the select it
• then select " Yes -- Install XXX.zip"
• Wait it and Done " Reboot System Now "

Or 

If you want to flash whole firmware

Download the Firmware of Cherry Mobile Amber 2.0 HERE

SP Flash Tool
USB Driver

How to install the firmware?

Install with SP Flashtool:

• Turn off the smartphone. Cable is not connected to the computer.
• Remove the battery and insert it again
• Connect your phone to a computer cable. The operating system detects a new device
• Disconnect the cable from the computer.
• Run flash_tool.exe
• Choose File> Open File Agent download and specify the file MTK_AllInOneDA.bin.
• Click Scatter File and select the MT65xx_Android_scatter.txt file (it's in the folder with the rom).
• Click "Download".
• Connect your phone to a computer cable. The program should see and blink. If the phone is not detected, then unplug it from the computer,
• remove and insert the battery (if the battery is removable) and reconnect it to the computer.
• After (OK) click Stop and disable any phone.
• Completed.