Blackberry z10 www.bberror.com/bb10-0004 eroor fix guide.
- Download blackberry 10 latest auto loader from blackberry or Mirror
- Install blackberry link or blackberry desktop [to install all drivers correctly]
- Double click on Auto loader exe file.
- Connect Blackberry phone with battery to your PC.
- Auto Loader will connect your phone in Boot room Mode let it complete process.
- After complete this process you need to upgrade your phone via WiFi or Blackberry Desktop software.