Topics created by klaus

Yeah, I believe there's a 3D model out there somewhere. Printing in plastic is a whole different scenario - there you're not dealing with the negative effects of nearby metal and so you're not limited nearly as much as you are if you replace the chip/inlay in a metal ring.
If you'd like to have a play around, pm me and I'll get your address to send you a ring with a defective inlay.

There are a few posts here concerning aftermarket NFC antennas, @jasok2 was modifying an Asus nfc reader and testing some of those antennas on it.
Basically any phone with a removable back plate with the NFC antenna mounted there will have accessible contacts, most Sony phones are that way though the waterproof ones are of course inaccessible unless you're willing to lose your waterproof rating.
Anything to do with aftermarket Qi is going to make NFC reception worse, not better.