Can I cancel my service while it's still active or extent my service period? Kimchi Mobile Team August 11, 2017 02:18 Updated Follow You can use your SIM card for 90days upon your arrival and service will not be extended. If you would like to continue using this service, please sign up for a contract plan at kimchimobile.com Related articles How can I check my balance? Can I use this service outside Japan using International roaming? Comments 0 comments Please sign in to leave a comment.