Below is the direct link to download the Cktel X21 Firmware ROM (Flash File). This firmware helps you fix boot loop issues (stuck on boot logo), forgotten password (phone lock), unknown baseband, invalid or null IMEI, network issues, FRP, privacy protection password (anti-theft) and other software-related issues on your Cktel X21.
Caution: Follow the instructions on how to flash this device carefully. We will not take any responsibility for whatever that may happen to your device. Make sure you are downloading the exact firmware of the device you want to flash because flashing a wrong firmware will make the device completely dead, can’t power on, can’t charge and will not be detected by a computer.
Download Cktel X21 Stock Firmware (Flash File)
File Name: Cktel_X21_MT6580_20180709_5.1.zip
File Size: 555 MB
How to Flash: Follow Instruction
How to Flash
Step 1: Download & extract the Firmware (Flash File) on your computer.
Step 2: Open the extracted folder, there you will get the firmware of the device.
Step 3: Make sure you install USB Drivers on your Computer to ensure that the device gets connected (skip this step if drivers are already installed).
Step 4: Launch the Tool required, Select the firmware and flash your device.
[*] Take a backup: All data on your device gets wiped after flashing so take a backup of your personal data before flashing or installing the new firmware. As this ease you to recover them whenever anything wrong happens.9
[*] Read flash: It is always advisable to backup the firmware of the device you are about to flash unless the device is completely dead (can't power on).
[*] Read me: Make sure you read & follow this tips & guides before you completely proceed to flashing your device. These tips are very important to be ignored.