how to reboot blackberry completely

Well with my experience, I found there are two types of rebooting.
1. Partial Reboot
2. Full Reboot

PARTIAL REBOOT:
You can power off the device by simply selecting the “Turn Power Off” from the menu.
By this option, the phone simply goes to partial power off mode. i.e you can restart the phone by pressing “end calls” key.
This is similar to Sleep Mode in PC.

FULL REBOOT:
This is the total reboot of the device. You can see the Loading Screen of Blackerry.
it happens in case of installing, updating or rebooting some system apps. Sometimes third party apps  require this reboot. They automatically request for a full/hard reboot.
For full reboot, there are two methods.
1. Pull the battery and re-insert it.
2. Press and hold Left Alt Key + Right aA Key + Del

We can follow this method in the events of
1. Hung Phone
2. Application Not responding
3. TrackPad not working.