LG Mobile - How can I upgrade smart phone software without PC?

How can I upgrade smart phone software without PC?

  Check Point

           ■ Preparations

               - Preparations need to be made for software update.

               - When remaining battery is low, update may stop midway. It can proceed only when remaining battery is 50% or more.
                  Please charge batteries before update.

               - It is recommended to back up data before starting an update.

               - When updated, most recent version will be installed and downgrade is unavailable.

  How to Setup

           ■ Software Update

               1. Tap settings.

                2. Tap General on top right.

               3. Go to General and drag screen downward. Go to About Phone . 
                   (App> Settings > General> About Phone > Update Center > Software Update > Check Update )

               4. Click Update Center.

               5. Tap Software Update.

               6.   Select Download via Mobile Network of Wi-Fi .

                7 .   Install downloaded software.

               8 . Turn power off and back on after installation. Update is complete.