Unicom number can't answer calls across regions.

The common reasons why mobile phones can't answer calls and their solutions are as follows:

First, check whether the mobile phone is in arrears, and it is recommended to pay for recharging;

2. Check whether the mobile phone is set with call forwarding, flight mode, call barring, etc. Suggest canceling and try again;

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

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

5. Try restarting or changing your mobile phone to see if you can answer the phone;

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

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