If the phone just turns on normally, your stock firmware has disabled the key combo. Proceed to Method 2.
Fastboot is a diagnostic and engineering protocol built into the bootloader of Android devices. Unlike Recovery Mode (which lets you wipe data or install OTA updates), Fastboot allows you to modify the actual partitions on your phone’s storage (e.g., boot , system , recovery ) directly from a computer via a USB cable. How to Open Fastboot Mode on TECNO Pop 5
: Open a terminal or command prompt and type: adb reboot bootloader . If the phone just turns on normally, your
Simultaneously press and hold both the Volume Up button and the Power button . How to Open Fastboot Mode on TECNO Pop 5