What do blacklists and whitelists mean in mobile phones?

Mobile phones generally come with whitelist and blacklist functions. White list means that only the people in this white list will call and send you text messages after setting. Anyone who calls you or sends you a text message that is not on the white list will be directly hidden by the system screen.

Blacklist means that after you add people you don't want to contact, people on the blacklist will be directly blocked by the system when they call you, and the other party will prompt that the number is busy and not in the service area.

Extended data

How to set the black and white list in the mobile phone;

1. Open the mobile phone (take Huawei Glory 9i mobile phone as an example), find the mobile phone housekeeper on the mobile phone, and click Enter.

2. Enter the phone housekeeper interface and click the harassment interception option.

3. Find the bottom interception rule.

4. You will see the settings of blacklist and whitelist in the interception rules interface.

5. If you want to set a blacklist, click the blacklist to enter and click Add below. You can choose to add it from your contacts or phone records. After adding it, I won't be harassed by these numbers anymore.

6. The method of setting the white list is similar, just click Add.