I'm awaiting delivery of my 640 XL LTE and would love to have Qi capabilities. I've got the Nokia charging plate that I use for my 930. Anyone has got any ideas around fabricating the back cover to make it Qi capable? I see someone has got back cover for 920 and planning to fix it to the 640 back cover etc. There should be a solution / back cover that can utilize the contacts (4 pins) on the back side of the 640 XL. I'm wondering why its not in market yet!