Security business. According to the inquiry of China Mobile official website, the super sim card can be used as a meal card, an access card, a transportation card, a car key, a 5G electronic signature, a large amount of money transfer, etc. Access control of super sim card belongs to security business. Super SIM card has covered three major operators: China Mobile, China Telecom and China Unicom, and has landed in dozens of provinces and cities across the country.