N8: touchscreen reactivedess drops when not in han...

Today I noticed that when my N8 is lying on the table and I don't touch-hold it, the touchscreen sensibility is unconfortable, as I have to press harder and keep the finger longer to get a reaction. As soon as  I simply touch with the other hand the device,  or I keep it in the hand, the reactiveness recovers as for magic. It's odd, isn't it?

My C7 appears to lose some touchscreen sensitivity when it's plugged into the mains charger. Capacitive touchscreens entail sensing the capacitive virtual ground effect of a finger or the capacitance between sensors on the surface. Power supply units can influence the virtual ground effect, as can touching the metallic parts of these phones. So I think this is probably all related to these electrical characteristics that can change slightly during normal operation of the phone.

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