A: "Can you please help me?"
B: "What is it?"
A: "How to block someone on WhatsApp?"
B: "Easy! Click on the contact you want to block. Then click the hamburger icon at the top right corner of the screen. Click more then click block. Finally, press 'BLOCK'! Done!"
A: "Thank you!"
Few moments later....
B: "Did it work?"
A: (didn't receive the message)
B: (confused himself)