https://www.theguardian.com/technology/2017/sep/25/iphone-8-glass-back-apple-repair-cost-screen-replace-accident

Apple’s ‘most durable glass ever in a smartphone’ claim likely to be put to the test with first iPhone 8 accidents, but repairs won’t be cheap, reports say

The iPhone 8 and 8 Plus have glass backs that, if smashed, cost more to replace than the screen.