You need to have the device initially. There are hardware components to mobile forensic devices that enable creating an image from a phone. Imagine that you're pulled over at the border and that you're asked for your phone. It can take maybe five minutes to make a copy of somebody's phone. Then you have an image, just like a CD image, that can be put on a USB drive and that can be shared between agencies. Data becomes a portable thing.
On February 15th, 2024. See this statement in context.