Wedge the flat end of the plastic spudger, or the tip of your finger, in between the back cover and the LG V10’s charging port.

If using a spudger, it should not be in the charging port, but between the metal lining of the charging port and the back cover.

Carefully lift up on the spudger or with your finger so that the back cover pops up. The rest of the back cover should easily come off by sliding a finger or spudger under the back cover and around the sides.