My first iTech disaster

So, I was updating my contacts list in the iPhone, bringing across numbers from my old phone that were missing. And of course, being tidy minded, I was deleted numbers from the old phone as I went, so I knew where I was up to.

Then, suddenly and mysteriously, my entire contact list on my iPhone vanished. Without a trace. All. Gone.

Of course, I don't have the missing numbers any more.

Nothing I can do about restoring the contacts list till I get home now. Most of the numbers I'm missing are mobi...