What Android Version are you running? You should see it in the Settings App und the section About

thought so but I was calculating from the 1000 kb in the specs. So 1024 / 8 = 128 B ...

Weird... If both tags work fine on a different device, then it's the fault of the device. It's generally difficult to have good nfc in a full meal body device. Maybe post the question over at oneplus.net in the forums.

have you tried rolling the ring over the spot where it registers? sometimes rolling the ring will help. Also try holding it ontop of the spot and turn it.

Will it register the ring if you hold it right on top of the camera lens?

Hmm... the titanium rings can be a bit trickier to read but it shouldn't be such a problem. Can you still remove the back of the opo3 or is it a metal unibody device?

My post was to encourage John to look at your problem and answer it. He knows things best.

@johnyma22 any ideas?

What exact version of the NFC ring did you buy?