Blackberry Z10 hard reset procedure
Before you make any changes Please make sure that you have a backup copy of your BlackBerry device data.
BlackBerry Z10 hard reset :
1. In the device options, click Security Options.
2. Click General Settings.
3. Press the Menu key.
4. Click Wipe Handheld.
5. To delete all third-party applications from your device, select the Include third-party applications check box.
6. Click Continue.
7. Type blackberry and OK.
CAUTION: If you have turned on content protection, the process for deleting all device data can take up to an hour to complete. You cannot stop the process after you start it. If you reset your device, the process continues after the device restarts.