If the iPhone (which apparently already had a cracked screen, but regardless) was still under warranty and broke, they'd be refused service with 4 words- "You're launching it wrong."
Also, 19 miles (100,000 feet) is only about 4000 feet below where the highest skydiving record is.
They're trying to jump from 130,000 feet- at that point, a human passing through the atmosphere will reach Mach 1.3 at terminal velocity head-down.
So yeah, it's effectively space, but not quite.