One nice feature of the iPhone right now (and the Nokia N9, but not any other phones I've used): you can simply hot-swap the SIM without any battery pulling or

One nice feature of the iPhone right now (and the Nokia N9, but not any other phones I've used): you can simply hot-swap the SIM without any battery pulling or even rebooting. Just take out the tray, replace the SIM, and pop it back in.