I purchased an NFC ring and just received it. Scanned it with my phone and got a website, downloaded the app and installed it. Ring was working fine until I wrote to it. Just simple text saying “Hello”. Now when I scan the ring, I get an “Invalid tag”. I’ve tried reading, writing, erasing, none of them work. I tried another phone, still get “invalid tag”.
Did I just brick this thing by trying to write to it? Am I just dumb and doing something wrong?
I asked tech support and they said to post here and to scan the tag with taginfo. Here’s what I got from that (Interestingly, that app does read the tag, anything else get’s an invalid tag error)
** TagInfo scan (version 4.24.8) 2021-10-22 11:42:23 **
Report Type: External
-- IC INFO ------------------------------
# IC manufacturer:
NXP Semiconductors
# IC type:
NTAG203(F) (NTAG203(F))
# NFC Forum NDEF-compliant tag:
Type 2 Tag
-- NDEF ------------------------------
# NFC data set information:
NDEF message containing 1 record
Current message size: 20 bytes
Maximum message size: 137 bytes
NFC data set access: Read & Write
Can be made Read-Only
# Record #1: vCard record:
Type Name Format: MIME type (RFC 2046)
Short Record
type: "text/x-vCard"
Hello
Payload length: 5 bytes
Payload data:
[0] 48 65 6C 6C 6F |Hello |
# NDEF message:
[00] D2 0C 05 74 65 78 74 2F 78 2D 76 43 61 72 64 48 |...text/x-vCardH|
[10] 65 6C 6C 6F |ello |
# NDEF Capability Container (CC):
Mapping version: 1.0
Maximum NDEF data size: 144 bytes
NDEF access: Read & Write
E1 10 12 00 |.... |
# Control TLVs:
Lock Control TLV at address 0x04, offset 0
* Dynamic lock bytes at address 0x28, offset 0
- 16 lock bits
- 16 bytes locked per lock bit
01 03 A0 10 44 |....D |
-- EXTRA ------------------------------
# Memory size:
168 bytes total memory
* 42 pages, with 4 bytes per page
* 144 bytes user memory (36 pages)
# IC detailed information:
Full product name:
* NT2H0301G0DUD or NT2H0301F0DTx
# TagInfo Version:
Version :4.24.8
# Device Info:
Device Model :samsung ( SM-N975U )
Android OS Version :11
-- FULL SCAN ------------------------------
# Technologies supported:
ISO/IEC 14443-3 (Type A) compatible
ISO/IEC 14443-2 (Type A) compatible
# Android technology information:
Tag description:
* TAG: Tech [android.nfc.tech.NfcA, android.nfc.tech.MifareUltralight, android.nfc.tech.Ndef]
* Maximum transceive length: 253 bytes
* Default maximum transceive time-out: 618 ms
# Detailed protocol information:
ID: 04:08:7F:32:93:36:80
ATQA: 0x4400
SAK: 0x00
# Memory content:
[00] * 04:08:7F FB (UID0-UID2, BCC0)
[01] * 32:93:36:80 (UID3-UID6)
[02] . 17 48 00 00 (BCC1, INT, LOCK0-LOCK1)
[03] . E1:10:12:00 (OTP0-OTP3)
[04] . 01 03 A0 10 |....|
[05] . 44 03 14 D2 |D...|
[06] . 0C 05 74 65 |..te|
[07] . 78 74 2F 78 |xt/x|
[08] . 2D 76 43 61 |-vCa|
[09] . 72 64 48 65 |rdHe|
[0A] . 6C 6C 6F FE |llo.|
[0B] . 74 61 72 74 |tart|
[0C] . 65 64 FE 00 |ed..|
[0D] . 00 00 00 00 |....|
[0E] . 00 00 00 00 |....|
[0F] . 00 00 00 00 |....|
[10] . 00 00 00 00 |....|
[11] . 00 00 00 00 |....|
[12] . 00 00 00 00 |....|
[13] . 00 00 00 00 |....|
[14] . 00 00 00 00 |....|
[15] . 00 00 00 00 |....|
[16] . 00 00 00 00 |....|
[17] . 00 00 00 00 |....|
[18] . 00 00 00 00 |....|
[19] . 00 00 00 00 |....|
[1A] . 00 00 00 00 |....|
[1B] . 00 00 00 00 |....|
[1C] . 00 00 00 00 |....|
[1D] . 00 00 00 00 |....|
[1E] . 00 00 00 00 |....|
[1F] . 00 00 00 00 |....|
[20] . 00 00 00 00 |....|
[21] . 00 00 00 00 |....|
[22] . 00 00 00 00 |....|
[23] . 00 00 00 00 |....|
[24] . 00 00 00 00 |....|
[25] . 00 00 00 00 |....|
[26] . 00 00 00 00 |....|
[27] . 00 00 00 00 |....|
[28] . 00 00 -- -- (LOCK2-LOCK3)
[29] . 00 00 -- -- (CNT0-CNT1, value: 0)
*:locked & blocked, x:locked,
+:blocked, .:un(b)locked
--------------------------------------