Samsung SM-J105B User Manual page 14

Basics
► Dual SIM models: Insert the SIM or USIM card with the gold-colored contacts facing
downwards.
Insert the primary SIM or USIM card into SIM card slot 1 (
USIM card into SIM card slot 2 (
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.
).
2
14
) and the secondary SIM or
1
2
1