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A worker sorts through boxes of used phones at what Gazelle calls its "device intake" factory in Louisville, Kentucky.
A row of workers perform repairs to used phones that people have sold to Gazelle.
Workers pull phone, laptops and tablets that customers have ordered.
A box full of used phones waits to be sorted and inspected.
Workers inspect and grade used phones.
A worker repairs a used iPhone.
A worker performs repairs on a used iPhone.
More iPhone repairs are under way.
A closer look at an iPhone repair job.