1. Report loss: stop using this mobile phone number, and then go to the local Unicom's own business hall to apply for a replacement card. The loss can be reported by calling the local Unicom customer service hotline 100 10, or by logging in to China Unicom APP.
2. Handle account cancellation business: Go to the local Unicom's own business hall with the owner's valid certificate, or log in to China Unicom APP to handle account cancellation business.