TO REBOOT INTO RECOVERY, TURN YOUR Phone OFF, PRESS VOLUME UP + POWER BUTTON TOGETHER TO ENTER RECOVERY.Now if it shows the command like this then reboot your device.To flash the recovery, Type the following commands by order.if you want to continue, you must first fix your problem. ADB acts as a bridge which allows you to push, modify, debug, and tweak system files very easily.
It’s a command-line tool which enables an Android device to communicate with your computer effectively.
If the phone is NOT liste d this indicates that your drivers or cables are not installed correctly. Minimal ADB and Fastboot tool is one of the most sought after ADB and Fastboot tool for Android devices. If your phone serial number shows up you are good to go and may continue.
Download the Minimal ADB or Full ADB Zip and install/Extract it on your computer.Now you need to enable the OEM Unlockby going to Settings -> Developer Option and Enable OEM Unlock.To Enable the Developer Option, Go to your Settings -> About Phone -> Now Tap on the Build Number 7-8 Times until you see a toast message “ Developer option enabled“.You need to enable the Developer Option.