Can I use VoIP apps? e.g. Skype Customer Support December 05, 2018 09:10 Updated Follow Yes, VoIP applications are supported. Examples of supported applications are Skype, Line, Viber, WhatsApp, and KakaoTalk. Related articles I have never used a Pocket WiFi before, what is it ? How many devices can connect simultaneously? How long does the battery last? Fair Usage Policy (FUP) for Unlimited Plan Can it be used outside of Japan? Comments 0 comments Please sign in to leave a comment.