Do I need to purchase SIM card separately? Customer Support July 31, 2021 04:26 Updated Follow No, our Pocket WiFi does not require a separate SIM card. Related articles Are there any settings required for the Pocket WiFi? How do I charge the device? How long does the battery last? If I forgot to return the devices before leaving Japan, what should I do? Do you require minimum length of contract? Comments 0 comments Please sign in to leave a comment.