Yesterday I received a weird message on my iPhone 4, it was a completely black screen with a wide green / standard button at the bottom.
It seemed like a kind of broadcasted message.
The message said something about RSVP.
I've never seen a message like this before, wasn't an email, SMS or iMessage. I did a search on Bluetooth apps to see if I could see this type of thing, but didn't find anything.
I dont know if its related, but a few minutes later I heard a sent message noise.
I can't find the message in texts or email either.
It all feels like I've been hacked into some how.