Foldable phones are one of the hot topics in mobile tech today but, for a short while, that wasn’t the only eccentric new design in the industry. Dual-screen phones also offer more display than their regular single-screen counterparts but for a different purpose, one that wants to banish bezels on the front by relocating everything to the back. Of this rare breed of phones, the Nubia Z20 is perhaps the only one that ever reached US shores officially. You might, however, want to hold off if you’re that type that needs to have your phone repaired often.
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https://www.slashgear.com/nubia-z20-teardown-hints-at-difficult-repairs-03598255/