iPhone Duo fails durability test after sand jams its hinge

A durability test of the iPhone Duo, conducted by YouTube channel JerryRigEverything, shows the device breaking after sand is packed into its hinge and repeatedly opened and closed. The experiment highlights the phone's vulnerability to sand damage. The test progressed from scratch tests with a cutter to pouring large amounts of sand onto the screen and forcing sand into the hinge mechanism. After sand was lodged inside, the iPhone Duo failed to close properly, producing a grinding noise with each movement. The video serves as a warning against using the iPhone Duo near beaches or sandboxes. If dropped and sand enters the hinge, the device may suffer permanent damage, leaving users with a persistent grinding sound and compromised functionality.