Hello,

I think i figured out a way to see if someone has blocked you, but if this situation happened to anyone knowing for sure they werent blocked, please let me know because i need to know if my theory is right or wrong.

If they have mobile, and you send them a message, it will say this person cannot recieve messages, that could mean you have been blocked- am I right? I tested it out and it proved true.

My question is, has anyone had that problem knowing for sure they are not blocked?

not everyone has the SMS "text messages" feature on alllow on their phone...due to the phone plan they are on,some plans only allows sending and receiving of direct voice calls....
or  also their text messages is full at the limit so there is no more room in the inbox....that will also give you the same message.

so yes I personally have had the problem..sent messages not received because of these reasons.

So... I guess it's a very possible way... but a very inaccurate way... a long with any other block checker you could find .