Réinitialiser Motorola Q9

Solution 1
1) Power off Phone
2) Hold center button
3) Phone power on while pressing center button
4) master reset menu should come up
Solution 2
1) turn off device
2) Press and hold "E" and "Z" keys (nota Z=W on azerty keyboards)
3) Press power button once
4) When screen comes on, let go of.