There's nothing more annoying than being harassed by calls or messages from private (hidden) numbers. Thankfully, your Android device will allow you to block calls from private numbers.
Block Calls From Unknown Numbers on Android
Although most higher end Android smartphone models have a built-in feature to block incoming calls and messages from hidden numbers, the steps may vary slightly from one manufacturer to another. However, in general, you should be able to access this setting from the Phone app.
Open the Phone app, and tap More
> Call Settings
> Call Rejection
Next, tap Auto reject list
Now, toggle the Unknown
If your Android smartphone does not include an option to block unknown numbers, you can also download and install call blocking apps such as Call Blacklist
or Call Blocker
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