Wedge the Spudger at an upward angle in between the two pieces of plastic above the audio jack. Be careful, this may take a firm push.

Gently point the Spudger at a downward angle into the gap between the bottom cover and the rest of the device. Take care to work the Spudger all the way in between the pieces when doing so.

Use the Spudger as a lever to gently pop the bottom cover over the lip of the audio jack.