I have just completed the Mod successfully using only copper tape and electrical tape.
NO SOLDERING.
I would recommend also reading
this thread for reference
I would Recommend watching these videos
[YT]http://www.youtube.com/watch?feature=player_embedded&v=0ga4N_Ih9GE[/YT]
and the video posted above
[YT]https://www.youtube.com/watch?v=uAqP3T_Mbzg&feature=player_embedded[/YT]
this method i think produces the least bulk to the back case.
I can confirm that is does not work with
casemate pop with stand for the S3
hope this helps
just to update my post
the copper tape adhesive I have used does not work reliably, the adhesive is not enough make the tape adhere to the contact points from the coil. Electrical tape does not stabilize it enough. Couldn't find a way to make it stay. My charging would go on and off sometimes.
I soldered the copper tape to the contacts of the coil. Note that the soldering parting not on the phone itself but the part you removed from the back cover of the webOS device I used.
also, I think it is better to use one continuous strip of copper tape.