How to tell if someone has blocked your number on iPhone

There’s a scene in the second last installment of the Harry Potter movies where the minister of magic comes in and says “these are dark times.” The minister is talking about the return of the Dark Lord and how it doesn’t bode well for the mankind. In this digital era, these “dark times” are often lurking in form of cyber attacks, malware threats or in a very non-threatening — yet hurtful — way: being blocked by someone without getting know.
Blocking someone on an iPhone is as easy as it is to contact them. While it is a convenient feature for the user who is blocking someone, the same feature may leave the person who has been blocked a bit flummoxed after being unable to contact them. Readers must note that there is no absolute way to be sure if you have been blocked by a particular iPhone user (apart from the contact telling you this, of course) but there are signs that can sort of confirm that indeed you have been blocked.