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How to restore the caller ID number of the mobile phone-How do I know?

Take Huawei mate30 and EMUI 10 as examples:

1. Send the SMS of the mobile phone operator number to the mobile phone operator first.

2. Find "Function Service" on the mobile phone operator's reply menu and send the previous number to the mobile phone operator.

3. Find "Caller ID" on the reply menu, and then send the previous number to the mobile phone operator.

4. Find "Turn on caller ID" on the reply menu, and finally send the previous number to the mobile phone operator.

Take Apple 1 1 and IOS 13 as examples:

1. Restore from icloud backup data. Turn on the phone, click Settings, close the Address Book button after entering icloud, select the option of "Keep it on my iPhone", click the "Open Message Record" button again, and click "Merge".

2. Re-import the SIM card address book. When the phone is in standby mode, enter Settings-Address Book-Import SIM card address book in turn, and then return to the desktop.