download here CoolPad Catalyst 3622A stock ROM
The firmware shared on this page https://9jarom.net/coolpad-catalyst-3622a-firmware-flash-file-download/is officially released and helps you to recover your Coolpad Catalyst 3622a if you ever got bootloop, software error, update error, hanging and dead issue, If you are going to flash the above Firmware on your https://9jarom.net/coolpad-catalyst-3622a-firmware-flash-file-download/device, then take a backup of everything as because your personal data will be deleted after flashing the stock firmware. flash this firmware using any professional Tool like HUA box NCK box