Nokia X, X+, XL4G, X2, 2, 3, 5, 6, 7 enter Recovery method as follows:
Turn off the phone completely, press and hold the volume + button and power button to turn it on (or plug in the charger and wait for the charging animation to appear on the screen while holding down the volume + button and power button), and wait for the Recovery menu to appear on the screen before letting go. Then, you can perform the restore operation.
For Nokia 7, if you see no command, you need to press the volume + key while holding down the power key to bring up the Recovery menu. For Nokia 8, you need to shut down and press the volume + key to plug into the computer (it must be a Win7 system and above, not a charger), after the no command appears, bring up the Recovery menu in the same way, and then you can perform the restore operation Up.