1. You can log on to the home page of Unicom's online business hall, click Convenience Service > Internet Card Number Query, select the province, then enter the ICCID number (19 or 20 digits on the back of the USIM user card), and click Query to query the Unicom wireless network card number.
2. If you forget the attribution of the wireless network card, it is suggested that you contact the manual customer service or go to the business hall to make an inquiry, which is subject to the actual inquiry.