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They literally did this 7 years ago with the Motorola Z series and the insta share projector mod. You can get the phone and the projector real cheap used. Pair it with some SoundCore minis paired together and you have yourself a portable movie theater.

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There are also Xperia Touch(G1109) and numerous other AliExpress projectors with Android device integrated. The idea is potentially valid but IME the lamp tech available are just too dim.

That is a micro projector that attaches to the phone, less of a mod and more of a specialised piece of hardware.

It was also 50 lumens where a typical home theatre projector is more like 2000 lumens.

There's a reason most people own a tv and almost nobody owns a micro projector, they're not very good.

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