JerryRigEverything and iFixit tests expose iPhone Duo weak spots

A durability test left the iPhone Duo's inner display with permanent green lines and eventually made it unresponsive after bending. iFixit linked the failures to stress near the hinge's central support but could not confirm the cause; an inner screen replacement costs about $1,000.

• Inner display scratched at Mohs level 2, with deeper grooves at level 3
• Bending produced green lines, then the screen stopped responding
• iFixit gave the iPhone Duo 5/10 for repairability, its best foldable score
• Inner display replacement costs $999 without coverage