Heard a few reports that wireless charging still works through cases.But people for fast wireless charging you will need to remove the case/cover because with s7 edge wirelessly charging the phone is slow. Also don't know whether apple supports wireless charging with case/cover or not.
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Do you know about fast wireless charging whether it be done with or without case on 8 or X?
If a case manufacturer does the right thing, they'd confirm it on their website. If not, best to ask them before buying.