Why does the Xiaomi Smart Band 10 fail to reply incoming calls with message?

If the Xiaomi Smart Band 10 fails to reply incoming calls with message, please refer to the following details for troubleshooting:
1. Failing to reply incoming calls with message is a result of the process of replying with message. It is an unexpected problem and has nothing to do with the band;
2. It is caused by the permission gotten by the Mi Fitness APP from the phone or the incompatibility of the phone with the Mi Fitness APP;
3. By checking whether the relevant permissions and options are enabled on the phone, the issue will be solved.