Solution:
There are many situations where it is unable to answer the phone, such as when it is unable to make a call, or when it is unable to pick up a call.
1. The first situation depends on whether the "call transfer" function has been set up, such as always switching, busy switching, etc., or turned on the "harassment interception" function. Turn that off and try again.
2. The second case might be because there is a software conflict on the mobile phone. It is suggested to back up the data and restore factory settings. Restart to test without restoring the backup.
3. If it still cannot be resolved, it is recommended to go to the local after-sales center for inspection whether the hardware failure is caused by a hardware failure.