LG G4 -H815 Owner's Manual page 23

WARNING
Do not insert a memory card into the microSIM card slot. If a memory card
happens to be lodged in the microSIM card slot, take the device to a LG
Service Centre to remove the memory card.
NOTE
Only microSIM cards work with the device.
•
3 Insert the battery.
4 To replace the cover onto the device, align the back cover over the battery
compartment
Getting to know your phone
and press it down until it clicks into place .
21