I keep my tablet (Galaxy Tab S 10.5) always on airplane mode - as I didn't put a sim in it.
Sometimes (yes, sometimes, lol) when scrolling down the message list, instead of "Load more messages", I get "Airplane mode", and I won't be able to load more messages even if I click on it, or try to scroll further.
Why would airplane mode mess with that? I'm still normally connected to a wifi connection.
Also bonus question: I set my tablet to sync 15 messages, but it seems to load 50 when opening the app. Any reason for that?