Alleged Galaxy S9 clear case restates the fingerprint scanner move and the audio jack
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Another welcome thing is the obvious presence of a standard headphone jack, and the rest of the side layout seems to mimic the buttons, mics and speaker openings of the Galaxy S8, which will likely be transferred over to the S9 as well. All in all, the Galaxy S9 may be an iterative upgrade, righting what was perceived as wrong with the S8, not that we expected some radical overhaul of Samsung's still-fresh Infinity Display design anyway.
source: /Leaks
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