Below is a collection of download links to flash files, firmware, stock roms or pac files for Itel A20. If you wish to unpack or extract the contents of the pac file then follow the guide @ https://www.hovatek.com/forum/thread-6236.html
The firmware above is in .pac format (after you extract from zip, rar or 7z file) so this means you can flash with Research Download or Upgrade Download tool, Infinity Chinese Miracle II SPD Box, Miracle Box or any other Chinese box or tool which supports flashing in PAC format.
Before flashing, ensure that:
The battery is charged to an extent and inserted into the phone
