Do I need to purchase SIM card separately? SakuraMobile December 05, 2018 09:15 Updated Follow No, it does not require a separate SIM card. Related articles Is there any settings required for the Pocket WiFi? How do I charge the device? If I forgot to return the devices before leaving Japan, what should I do? Do you require minimum length of contract? How long does the battery last? Comments 0 comments Please sign in to leave a comment.