PINs and PUKs
Every now and then we drift off-thread into phone/smart-phone country so here's a little thought from me - do you know your PUK ? Sure, many of us are running on old SIM cards which get passed down from phone to phone, but when my wife's year-old phone suddenly demanded her PUK (I am not going to go into why, but she was in London) and I realised it was the SIM card from a phone I bought here in Spain in 2002, I hadn't a clue where the paper was or what the number was. Yes, my much-maligned Spanish operator this time came up trumps and e-mailed it to me, so crisis over...for now. But when freaking out in the joy over the new smart phone or dongle it's all too easy to forget: three wrong PIN's and you need your PUK; a few wrong PUK's and the device is on the way to being useless.
WRITE IT DOWN !