The best thing about MetroPCS / T-Mobile phones is, their bootloaders are unlockable, and that’s the very reason their phones are the most popular among the prepaid smartphones.
LG K20 Plus is one such MetroPCS Smartphone. Once we unlock its bootloader, we can easily flash a custom recovery such as TWRP. In TWRP can easily flash Magisk or SuperSU to root our K20 plus.
“Bootloader unlock” should not be confused with SIM unlock. Your device will remain locked for other carriers even after unlocking the bootloader. Sim unlocking is an altogether different thing and needs to be dealt with in a different manner.
Now let’s proceed with the bootloader unlocking –
Before connecting your phone to the computer you should install the LG K20 USB Driver on your PC.
How to Unlock LG K20 Plus Bootloader
Before proceeding with the below procedure, we’ve to turn on “USB Debugging” and Enable “OEM unlock” within the developer options.
Once done, connect your K20 Plus to PC via USB data cable and select USB connection mode as “Charging” or “File Transfer”.