The Samsung Galaxy Note 4 is a cellular smartphone that was released in October 2014. The Galaxy Note 4 Model Number is SM-N910, SM-N910A, SM-N910T, SM-N910V, or SM-N910R4 for American variants.
When a device hangs in boot sometimes you can try a battery to resolve the situation. If that doesn't work I would try a factory reset. If that doesn't work I would try to reinstall the rom.
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