How to Enter Recovery Mode for Xperia Z2 manually

1.Power off your smartphone now.

2.Power on the Xperia Z2 and when the LED Notification lights up you need to press several times Volume Up or Volume Down, either one works.

3.The device will then show the Recovery Mode screen.

Use the Volume buttons to navigate between Recovery Mode options.
Power needs to be pressed in order to select to apply any Recovery options.