Can I use this service outside Japan using International roaming? Kimchi Mobile Team August 11, 2017 01:25 Updated Follow No, you cannot use this service outside of Korea. International roaming is not available on this service. Related articles What is the plan of Prepaid SIM card service? Can I let other people use my service? Can I recharge Prepaid SIM credits? Can I use 4G LTE? How can I check my balance? Comments 0 comments Please sign in to leave a comment.