Offline delivery? WhatsApp seems to do offline delivery. c.f. https://www.quora.com/Suppose-I-sent-a-text-on-WhatsApp-to-my-friend-It-shows-a-single-tick-Then-

Offline delivery? WhatsApp seems to do offline delivery. c.f. https://www.quora.com/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 https://www.quora.com/Suppose-I-sent-a-text-on-WhatsApp-to-m...