Samsung J1 SM-J120F - Manual (Page 38)

Applications
38
3 ► Single SIM models: Tap to make a voice call, or tap to make a video call.
Add the number to the contacts
list.
Preview the phone number.
Hide the keypad.
Delete a preceding character.
Access additional options.
► Dual SIM models: Tap or to make a voice call, or tap to make a video call.
Add the number to the contacts
list.
Preview the phone number.
Hide the keypad.
Delete a preceding character.
Access additional options.