Samsung SM-J260G/DS User Manual page 17

Basics
► Dual SIM models: 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.
3
Replace the battery and back cover.
).
2
17
) and the secondary SIM or
1