Why don't you display the number when you miss the phone message reminder?

1. According to the information you provided, if the caller ID of your mobile phone is unknown, it is usually because your mobile phone has no caller ID function. I suggest you reapply for activation.

2. You can handle caller ID in the following ways:

1 call home 100 10 manual customer service hotline or bring valid identification documents to the business hall of China Unicom;

2 Use the 4G package, and the package does not give caller ID service. If you need to apply for additional opening, you can apply through the following channels:

(1) Log in to the online business hall, click Self-service > Handling > Package Handling > 4G Combination Package on the homepage, click to enter the business package of re-selecting and changing packages, and recheck the caller ID;

(2) Log in to the mobile phone business hall client, and click Services > Handling > Package Change > 4G Package Change > 4G Combination Package. Click to change the package business package, and re-check the caller ID to make changes.

Tips: There are differences in business policies among cities, and the actual situation is subject to local policies.