The other week I was texting a friend of mine, and something happened that I haven't experienced before. Instead of receiving the text I'd just sent, my friend received a text I sent several months ago when I was helping her out with Physics homework. Since the text had long gone from both of our handsets, it made me start wondering what on earth could have happened.
I assumed that this meant all our conversations since at least that long ago must be logged or archived somewhere in the SMS system, by either my mobile network provider or hers. Would this be a correct assumption? And if so, what is the purpose or need for this, and how could this message have been erroneously resent to my friend, so many months later?