First phone with wireless charging mod was Xperia Mini Pro. That was easy. Phone was extremely thick. This year I bought Lenovo P770 and I did another wireless charging mod. I did “time-lapse-howto” video. Here it is.
“Find usb power and connect with palm pre coil, done”
[MORE]Back cover mod
First I have to prepare back cover of phone. Original magnets are weak and small so I install bigger magnets. I used my dremel and removed some plastic and make back cover thinner. Magnets are quite thick. Then I did same for coils PCB. There are two version of coils as you can see. On the right is thinner and is from ebay, $10 shipped.