Do phone shops keep backups of users' data...

...when they want to delete it from their phones? I'm only asking because what happens in the climax of this "movie" is the only way to explain how 99% of the data is deleted, before the boy pulls out the cable and somehow, all the data is restored. Although now, come to think of it, even that doesn't make sense! If the cable was disconnected, how could the data be copied back over??

Fuck off, film!