Ive been having the same problem for some time now, bought the ring from the kickstarter campaign, also, only one side of the ring can be written to
Latest posts made by yash
RE: Lumia 920
I tried using the ring with my nokia lumia 920
I have been getting this error for a few days now, it says "Alert Windows Phone is unable to use out Community Sweet Spot location servers., we hope to get this fixed as soon as possible, usually on nokia windows phone the nfc sweet spot is just below the camera"
I was able to find the sweet spot but I cannot do anything with the ring.