Help Block msg

[Selfie]

Hello
i'm still new with this phone, so please excuse me if its a stupid question.

How can i block, stop receiving fone call and text message from an
undesired person? got his/her number, just dont know how to "block" it
or add it to a blacklist or something

already downloaded apps, but i dont want another app to show msgs
want somethingthat uses the phone and do things there

thanks a lot

 

[idhbar]

use root call blocker.it is available in the market.