Second Duo observation: Tempered glass screen protector on the outer screen may be a mistake. The edges are very noticeable both when trying to use the phone closed and especially when using it opened.
XFEDI
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Duo thought #3: The lock/touch id button is too sharp. It makes the phone less comfortable to hold. Also, it sticks out too far and is too easily pressed. I’ve accidentally locked the phone several times when adjusting my grip. This would have been a great time to (re)introduce solid state haptic buttons.