1. Check the network connection: Make sure that your mobile phone is connected to China Mobile's network and the network connection is stable.
2. Check the coupon information: confirm whether the coupon information you entered is correct, including the denomination, expiration date, usage mode and other information of the coupon.
3. Contact customer service: If you can't solve the problem of collection failure, you can contact customer service staff of China Mobile and ask them about relevant solutions and processes.