What does unknown number mean?

1. If the caller ID of your mobile phone is unknown, it is usually because your mobile phone has not activated the caller ID function. It is recommended that you re-activate the caller ID function. 2. The caller ID function is enabled by default for general packages. If you are using the China Unicom 4G package, the package does not come with the caller ID service, and you need to apply for additional activation. 3. If the caller uses the function of hiding call information, such as using Internet phone software to make calls, an unknown number will be displayed.

Other common harassing phone numbers

Phone numbers starting with 400 and 800

Phone numbers starting with 400 and 800 are the hardest hit areas for harassing calls. Many companies or individuals often use these numbers. Make sales calls.

Phone numbers starting with 00

Phones starting with 00 are usually international calls and are also a common method used by scammers. You should be particularly vigilant.

Displaying "Unknown Number"

This basically comes from Internet calls, not that the caller ID function is broken. But now there are also Internet calls that can display numbers, such as "any number display" Internet calls (that is, the number is displayed as any number), so you must be vigilant when receiving an unfamiliar number.