How to stop spam, junk and automated message phone calls?

MichelleL: How to stop spam, junk and automated message phone calls?
They are usual phone calls you get several times a day for example: congratulations you have won something, etc, this is an important message from green… (something can’t remember), and other promotions stuff. Sometime when doing something important in the internet or you are sending an attachment which takes time to load, the phone interrupts the connection that happens to some broadband and you have to wait till it gets back online but interrupted by these unnecessary calls is absurd and annoying. Not sure is there any exact way to block these spam calls.

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Answer by obama’s Child
Answer this way
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