My SIM isn't working. What shall I do? Kimchi Mobile Team August 11, 2017 03:59 Updated Follow Please try the following steps: Please Check if the Phone detects the SIM card Please Check if there is a signal with signal bars. Related articles I got my SIM card but data is not working. What is the plan of Prepaid SIM card service? What kind of devices can I use? Comments 0 comments Please sign in to leave a comment.