Waterproof Ceramic NFC Ring, NFC Forum Type 2 215 496 Bytes Chip Universal for Mobile Phone, All-Round Sensing Technology Wearable Smart Ring, Fasion Ring for Men or Women (8#, Black)

works like it should

Like: It works. It is readable and writable. Other RFID rings in this frequency did not work or only worked if you took the ring off and held it sideways to the reader. This ring actually works, but may take a few tries. It is NOT as easy to read as a card key, but I always have this on so it's a good backup if my thumb is wet or dirty, or if the fingerprint scanner is wet.

I was planning doing various things with this ring. But it's lost so maybe I'll try again it took so long to receive it though.

It looks cool and is pretty comfortable, but it is already programmed and it isn't able to be changed. I used i used an rfid/nfc reader and writer and I wasnt able to program anything on it and when i scanned it it showed up with the numbers 0014550152 which means it was already programmed

It does the thing well

Nice look but the NFC feature are not compatible with iPhone 13pro max.

I purchased this NFC ring for the chip to use as an ID badge at work. I was very delighted when I found out that an iPhone could write to the ring using NFC Tools. I was able to upload my contact information to the ring and then password protect it so no one else could write to the ring but me.Yes it does come with it's own set of ID numbers programmed into the chip. That is the point of having it. It is a unique address for the chip to create an original ID for the device, and those numbers cannot be changed. You can however, add more data to the ring, such as contact info., addresses, websites, text messages, and emails.P.S. only 4 stars because the smallest size is 7 and largest size is 12. This needs a wider range of sizes to be perfect.

Ring inly works wheb on certain parts of the phone. Not a true fit either