Hi all, this may be a very dumb question but I figured I would throw it out to see if anyone can give me a hand here. I sent an iMessage to a friend of mine the other day and I noticed instead of the little 'delivered' message popping up under the sent little blue bubble, nothing showed up. Now if I am in the subway for example and have no service I get the red message indicating my message was not delivered. So it looks like I can send the message (I have service), but I did not get confirmation it was sent. I had sent a message to this friend a few days before and that was the last time I saw the delivered bubble pop up. The last message I sent was yesterday so its been a day and it still has not gone through. So, is this normal, and what does this mean? My friend is not one to just ignore messages (he's 20 and uses his phone a lot like everyone his age) or a broken phone and my phone has been working perfectly fine (I can text other people, have good service, etc).