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Some mobile stores now use transfer devices that allow customers to walk away with their contacts and media on a USB stick, or to transfer everything when upgrading.
But increasingly, mobile apps are able to do "over the air" back ups of contacts, diaries, and data to remote storage servers.
"That means that when you leave the store, all of your mobile content is automatically backed up," said Dianne Canham from mobile synchronization firm CelleBrite.
"The user doesn't actually have to instigate anything like going on the internet, or download anything, as this happens automatically," she said.