I've had my iPhone serviced at authorized service centers in Korea a few times. You are required to ensure there is no password on the iPhone at all. It was a l

I've had my iPhone serviced at authorized service centers in Korea a few times. You are required to ensure there is no password on the iPhone at all. It was a long time ago, so I don't remember if they gave any explanation for this requirement. I think they need to look up some diagnostic info on the phone?