Not long after I got my iPad Air, I was doing some web research when an unfamiliar notification popped up. I'd received a text message. You may not think that's strange, but my iPad is Wi-Fi only. I hadn't really done much with it yet, other than sync it with my Apple account so getting text messages was a surprise to me.
At first I was delighted I could get my text messages on my iPad because I’m forever leaving my iPhone behind, or leaving the sound off. But my iPad has become my constant companion. Of course it didn't take long to realise I only received some of my text messages. Only contacts with iPhones (or iPads) would be able to send me messages via Apple's iMessage network.
More importantly, though I realised that my replies to those text messages didn't always get through. Even though those contacts were iPhone users, sometimes the messages were listed as undelivered. Occasionally I'd get the...