Please answer when Apple's mobile phone jumps out.

Check whether the function of the mobile phone is normal

The common reasons why the mobile phone can't answer the call and the solutions are as follows:

1. Check whether the mobile phone is in arrears and stop working, and suggest to pay for it.

2. Check whether the mobile phone is set with call forwarding, flight mode enabled, call barring, etc. It is recommended to cancel and try again;

3. Check whether the function or signal of the mobile phone is normal. It is suggested to change the mobile phone or location and try again.

4. If roaming to other places can't be used, it is recommended to check whether the local network signal is normal and whether the roaming authority has been opened for the number;

5. Try to restart or change the phone to see if you can answer the phone;

6. Bring your mobile phone card to the local business hall for testing or replacement.