Mobile phone calls can't be sent by SMS.

The common reasons and solutions that mobile phones can't answer calls and send short messages are as follows:

1. Check whether the mobile phone is in arrears, and suggest to pay for recharging;

2. Check whether the mobile phone is set to call forwarding, turn on airplane mode, 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 recommended to change the phone or location and try again.

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

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

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

7. Check whether the inbox is full;

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