how to flash blackberry z10 With autoloader

1. Download the appropriate Autoloader above. Your model number can be found under  
      Settings › About › Model Number
2. 
   
   
   Turn off your BlackBerry 10 Dev Alpha device.
3. Run the downloaded Autoloader file.
4. When prompt shows “Connecting to Bootrom”, connect your device to your computer and turn it on.
   
   
   
5. If you have a password set on your device, type your password when prompted.
6. After your device restarts, complete the set up wizard.