LG Watch Sport User Manual page 17

Unlocking the SIM Card
If you insert a SIM card with a PIN lock, you have to enter the unlock code
to be able to use it in the watch. If the SIM card PIN lock is turned off,
disregard this section.
1
After turning the watch on, swipe up from the bottom of your watch' s
Home screen until the SIM Locked screen appears.
2
Tap the SIM Locked screen.
3
Enter the unlock code.
Basic Functions
SIM card cover
sealing pad
16