With enough force, almost every phone can fold in half – not even the best phones are immune to brute strength. But only a few can do it without suffering terminal damage. From retro revivals to cutting-edge clamshells, the best flip phones combine a flexible internal display with a secondary outer screen for the perfect blend of pocketability and top-tier hardware.

By hiding a larger screen on the inside, flip phones are half the size of a traditional smartphone. Their outer screens are getting smarter and smarter, too, saving you from constantly flipping the thing open to read notifications, reply to messages or check incoming emails. Add…

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