If your Tecno KJ5 (Spark 20) is stuck in a bootloop even after performing a factory reset, there are a few other steps you can try to resolve the issue:
1. Recovery Mode: Try booting into recovery mode and clearing the cache partition. This can sometimes help in resolving bootloop issues. To enter recovery mode on the Tecno KJ5, follow these steps:
- Power off the phone.
- Press and hold the Volume Up and Power buttons simultaneously until the recovery menu appears.
- Use the volume buttons to navigate to "Wipe cache partition" and select it using the Power button.
- Reboot the device and see if the bootloop issue is resolved.
2. Flash Firmware: If clearing the cache partition doesn't work, you may need to flash the firmware on your device. You can download the official firmware for your Tecno KJ5 from the Tecno Mobile website or other reputable sources. Flashing the firmware will reinstall the operating system and can often fix persistent bootloop issues.
3. Contact Customer Support: If you are not comfortable with flashing the firmware yourself, or if the above steps do not resolve the issue, it's recommended to contact Tecno customer support or visit a service center. They may be able to provide further assistance or repair your device.
Remember that flashing the firmware can be a technical process and should be done carefully to avoid causing further damage to your device. If you are unsure about any step, it's best to seek help from a professional or the manufacturer's support channels.