Samsung claims to have developed an "Ultra Thin Glass" for its new Galaxy Z Flip foldable smartphone, signalling scratch resistance and durability beyond that of similar products. But tests conducted by Zack Nelson using a Mohs Hardness Testkit [Amazon] — a set of styluses made of different materials — show that it is no more resistant to scuffs than plastic. In fact, he didn't even need the kit: his fingernail was sharp enough to leave marks. The "glass" scores 2-3 on the Mohs scale, compared to 6-7 for Gorilla Glass: "I don't know what material this is, but Samsung should definitely not be calling it glass."
Samsung has pitched this phone as a folding glass phone that 'bends the laws of physics' But… is folding glass actually possible? The only way to find out is with a scratch test. Overall I'm impressed with the Galaxy Z Flip. If they change the name of their screen material to something besides glass I would give it a 10/10 as far as folding phones go. The only physical characteristic this screen material shares with actual glass is the clarity. And I dont think thats fair to consumers. At all.
The Verge's Chris Welch got Samsung on the record to say there'll be a glass replacement service.
We asked Samsung if it planned to offer a screen replacement service for the Z Flip as it did with the Galaxy Fold. It will. Z Flip buyers can get a one-time screen replacement for $119, Samsung says. In addition, you can also get a specialized screen protector designed for the Z Flip for free one time. Here's the company's statement on that: