Also it's very hard to debug... A friend on iOS think he has sent you a (SMS) text message. You don't get it on your (non-apple) phone. You don't get it on y

Also it's very hard to debug... A friend on iOS think he has sent you a (SMS) text message. You don't get it on your (non-apple) phone. You don't get it on your (non-apple) work computer. Three weeks later you log on to your iMac/mac-mini/whatever that you hardly ever use to find messages from whoever uses apple phones and has your email address on their contacts. It turns out that logging in to your desktop PC can link your AppleId (email address) to iMessage and start swallowing your text messages. You can only rectify this setting on an apple computer. (Yes, I know I'm an edge case but I will never see iMessage as a good thing, walled gardens can suck).