K Charger is an electric vehicle charging and charging station search application provided by Clean Elex. When registering as a member at K Charger, personal information of the phone number is collected. The purpose of collection is to authenticate identity when ID/password is lost, to send a text message when automatically accumulating member cache, to send a text message for usage details and charges when settling for roaming, to inform the result of cash refund processing, as a means of cont