    Sentence 1:"I think a person blocked my  number, but I tried to text him and it  showed ""delivered"". Do you think it is  possible that he still receives my  messages if he had blocked my  number?"    Sentence 2: Suppose I sent a text on  WhatsApp to my friend. It shows a single  tick. Then I blocked the friend and  unblocked him. Will he receive my    messages, which were showing a single  tick before I blocked him?