Samsung J3 Pro User Manual page 14

Except for CDMA
Basics
2
Insert the SIM or USIM card with the gold-coloured contacts facing downwards.
Insert the primary SIM or USIM card into SIM card slot 1 (
USIM card into SIM card slot 2 (
Do not insert a memory card into the SIM card slot. If a memory card happens to
be lodged in the SIM card slot, take the device to a Samsung Service Centre to
remove the memory card.
Use caution not to lose or let others use the SIM or USIM card. Samsung is not
responsible for any damages or inconveniences caused by lost or stolen cards.
3
Replace the battery and back cover.
Removing the SIM or USIM card
1
Remove the back cover and battery.
2
Pull out the SIM or USIM card.
).
2
14
) and the secondary SIM or
1
1
2