to format Nokia x2-01 follow the tips:
- switch off your mobile
- press and hold 3+*+green calling button
- then turn on your mobile phone with keeping pressing the buttons
- if the lock code requested enter 12345
from inside your phone go to settings then Rest.factory sett ,if the lock code requested enter 12345
note that : all the data on your phone will be lost please backup your phone before doing the format.