GENERAL- What type of SIM is required for using myFirst Fone D3S? OAXIS Support May 09, 2022 07:15 Updated Follow You would need a nano SIM card with data and call functions. Related articles GENERAL-How do I setup myFirst Fone D3s? GENERAL-What network /LTE does myFirst Fone D3S works on? How to activate the Free SIM? How to Use the WatchPhone Comments 0 comments Please sign in to leave a comment.