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How to program an NFC tag with your phone

Updated: 23 October 2026

A new sticker from these amazon.co.uk packs often does nothing the first time an iPhone meets it. The tag is blank. This page is the write, the test, and the moment a read-only lock becomes permanent. It is not a ranking and not a way to copy a door fob. The kept listings are in the [RFID chip comparison](/hub/electronic-surveillance/rfid-chip). Peter F. wrote this on 21 October 2026 from those listings, Apple's background-reading note, and notes on locking. A qualifying purchase can earn a commission at no extra cost to you. Choose the chip first in the [RFID chip buying guide](/hub/electronic-surveillance/rfid-chip/sub/rfid-chip-buying-guide).

A new sticker from these amazon.co.uk packs often does nothing the first time an iPhone meets it. The tag is blank. This page is the write, the test, and the moment a read-only lock becomes permanent.

Our top picks

InnoHHustle InnoHHustle NTAG216, 30 rounds

Best overall

InnoHHustle InnoHHustle NTAG216, 30 rounds
8.0/10about £5.69
View offer
InnoHHustle InnoHHustle NTAG215, 50 rounds

Rank 2

InnoHHustle InnoHHustle NTAG215, 50 rounds
8.5/10about £6.99
View offer
OFFCUP OFFCUP round tags, 50 pack

Best value

OFFCUP OFFCUP round tags, 50 pack
7.8/10about £5.99
View offer
On this page
  1. 1.Why a blank tag stays quiet
  2. 2.Write a short record
  3. 3.Test before you lock
  4. 4.What the lock does and does not do

Why a blank tag stays quiet

On iPhone XS and later, background reading looks for an NDEF URI while the screen is in use. Airplane mode and Wallet pause it. A blank tag stays quiet. The £5.69 NTAG216 30-pack and the rectangle packs say to write first in NFC Tools, with NFC on and the phone unlocked. One UK review on the 30-pack does that, then reads at the top right. If it is still silent, suspect the aerial, metal, or a chip that is not the Type 2 tag in the title. UK reviews on the £6.99 NTAG215 pack still need a tight tap. A case or a metal ring can shift a 25 mm coil. Some phones, the NTAG213 rectangle listing says, can read and cannot write.

Write a short record

Start with a https link you control. Seritag treats NTAG213's 144 bytes as roughly a 136-character URL, a rule of thumb, not a test of these packs. Turn NFC on, add one URI as the first record, and hold the sticker toward the top of the back on many iPhones until the app confirms the write. Wake the screen and tap again without the writer. If the app says the tag is too small, stop. A 504-byte layout will not fit NTAG213, and a title that says NTAG216 does not make it so. The OFFCUP title says 144 bytes and a UK TagWriter scan reported 492. An Amiibo write on the NTAG215 listings is once only.
InnoHHustle InnoHHustle NTAG216, 30 rounds

Testsieger

InnoHHustle InnoHHustle NTAG216, 30 rounds
8.0/10about £5.69
View offer

Test before you lock

Test the sticker on the daily phone, case on. A UK review of the 594-rating NTAG215 pack says an iPhone 16 Pro did not see them with no case. On the £6.99 NTAG216 50-pack, one UK review found tags intermittent and slow on an iPhone, including with Home Assistant, and another did not. Do not lock all fifty after one success. Metal shelves and steel appliance skins stay silent after a good write. Six listings ban that surface, and the large NTAG215 pack fails there even though the bullets forget to. If the URL opens only inside the writer, check the first record is a URI and that airplane mode and Wallet are off.

What the lock does and does not do

These listings say a read-only lock cannot be reset. Wakdev's NFC Tools steps are Other, then Lock tag, and the action is irreversible. Lock only after the daily phone opens the URL. Seritag notes that many iOS writers apply a soft lock an NDEF app will respect and another writer can still ignore. A shared door, a printer account, or a staff ID stays with the person who runs that reader. This page does not copy an identifier onto a writable-UID card. If the first stickers refuse a short URI, the chip name is in doubt. A UK review of the £5.99 transparent NTAG216 rounds says the silicon is not NXP NTAG216.

Common questions

Why does a new sticker do nothing on an iPhone?
Background reading on iPhone XS and later expects an NDEF URI while the screen is in use. A blank tag has no record, so the phone stays quiet. The InnoHHustle listings say to write first with an app such as NFC Tools. Airplane mode and Wallet also pause Apple's background scan.
Where is the aerial on the phone?
On many iPhones it is toward the top of the back, which is where that UK review holds the tag. A 25 mm sticker still needs a tight placement in other UK reviews. A case or a metal ring can shift the sweet spot. Test with the case you actually use before you stick the tag somewhere you cannot reach twice.
What record should you write first?
A normal https URL, as the first NDEF record. That is what Apple's background reader is documented to open, and it fits in 144 bytes if you keep the link short. Add Wi-Fi or a longer note only after that tap works. Do not make the first experiment an Amiibo write, which the NTAG215 listings say is once only.
How do you know the tag is too small for the record?
The writer app reports a size error, or the capacity it reads does not match the title. NTAG213 is 144 bytes of user memory, NTAG215 is 504, and NTAG216 is 888, on NXP's figures. If TagWriter shows a different size, as on one OFFCUP review, trust the scan for that sticker and pick a record that fits it.
What happens if you set read-only?
On these listings the lock cannot be reset. You will not correct a typo in the URL without a new sticker. Wait until the daily phone opens the link. An iPhone lock is often only a soft lock, so a different kind of writer may still change the tag. Do not use the lock as your only protection for anything sensitive.
When should you stop and use the existing reader?
When the tag is meant to open a shared door, log into a printer, or identify a person. Those systems have an administrator, and a phone sticker is the wrong tool. Also stop if several tags refuse a short URL or the app names a chip other than the one on the packet. Buy a different pack rather than forcing a lock onto a tag you cannot read back.

Related pages

Best RFID chip

NTAG213 vs NTAG215 vs NTAG216

RFID chip

RFID chip buying guide: frequency, memory, surface

NFC sticker on metal: why steel shelves kill the tap

Sources

Public UK and manufacturer sources from the digest first, then the amazon.co.uk listings compared on this page. Prices and stars were taken on 21 October 2026. Affiliate links use tag pcuk26-21.

  1. NXP NTAG213/215/216 datasheet (retrieved 21 October 2026)
  2. NXP MIFARE Classic (retrieved 21 October 2026)
  3. NXP on phasing out MIFARE Classic (retrieved 21 October 2026)
  4. Ofcom IR 2030 (retrieved 21 October 2026)
  5. Wireless Telegraphy (Exemption) Regulations 2021, regulation 4 (retrieved 21 October 2026)
  6. ICO, identifiers and related factors (retrieved 21 October 2026)
  7. Apple, background tag reading (retrieved 21 October 2026)
  8. Seritag, on-metal NFC tags (retrieved 21 October 2026)