Originally Posted by akbarhash
Cool experiment, could you check if the aluminium sheet is affecting the signal.
I am not sure but I have seen some people say metal cases affect signal reception.
You would have to keep all other things same like position direction etc, like keep it on the table with alumnium sheet in a particular direction then check in settings
about status. then perform the same without the aluminium sheet keeping the direction unchanged.
In this case,the aluminum sheet has absolutely nothing to do with signal reception.The phone's signal transmitters/receivers are on the bottom of the phone,where the speaker is.The aluminum sheets cover only the area around the camera,where the processor and GPU are.So signal reception is completely unaffected.And I'm sure about that because I live in an area with relatively bad signal and any decrease in signal strength would show.