The iPhone Duo is Apple's new dual-screen form factor, and 9to5Mac put it through standard iPhone workflows to find where it breaks from convention. The video is not a spec rundown. It is a behavioral audit of how everyday tasks, things like app switching, media playback, and case compatibility, actually change when you have two displays instead of one.
The affiliate links in the description tell part of the story: dedicated Duo cases already exist, a separate battery pack category has emerged, and accessory makers are already fragmenting iPhone support into Duo and non-Duo SKUs. That supply chain response happened fast, and it signals how different the hardware footprint really is.
What makes this worth watching in full is the granular friction: the moments where a regular iPhone habit fails on the Duo and forces a new interaction pattern. The conclusion is less interesting than the specific failure points documented along the way.
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