NFC full form: Near Field Communication
What the three words mean, how near 'near' really is, and why NFC on a visiting card, in your phone and at a shop counter are three different jobs.
NFC stands for Near Field Communication. It is a short-range radio at 13.56 MHz that only connects when two things almost touch: the NFC Forum gives a typical range of up to 2 cm, and Android says 4 cm or less. On a visiting card, NFC means a battery-free chip holding a link. In a phone, it is the reader. At a shop, it is tap-to-pay.
Sources: NFC Forum, Android Developers
Near. Field. Communication.
Each word describes something real about how the technology behaves. Together they explain why a tap works only when the card is close, and why the card never needs a battery.
It only works close up. The NFC Forum, the body that writes the standard, gives a typical range of up to 2 cm. That short reach is by design: the NFC Forum describes the whole experience as centered on a tap, so a card has to be held to a phone to be read.
The phone makes a small radio field at 13.56 MHz, and a card chip that enters it is powered by it. In the NFC Forum's words, one side can also transmit power, which is why a card chip has no battery and never needs charging.
Once powered, the chip and the phone exchange data. NXP's NTAG chips, one family used in NFC cards, talk at 106 kbit/s - slow next to Wi-Fi, but a link is so small that the read is over before you notice.
How near is "near"? Five official numbers
Look up NFC range and the figures run from 5 mm to 10 cm. They are all correct. Each measures something different, and the gap between them is why a tap sometimes needs a second try.
| Figure | What it measures |
|---|---|
| 5 mm | What it measuresThe range at which the NFC Forum certifies connections |
| Up to 20 mm | What it measuresThe extended range in the NFC Forum’s newer Release 15 specification: four times the old 5 mm |
| Up to 2 cm | What it measuresThe typical range the NFC Forum gives for the technology |
| 4 cm or less | What it measuresWhat Android’s documentation says a connection usually needs |
| Up to 100 mm | What it measuresThe best case for NXP’s NTAG chips, with a strong reader and a large antenna |
What to do with that. The 100 mm figure is the chip at its best, with a reader built for distance. A phone's antenna is small and sits in one part of the body, so the numbers that matter for a visiting card are the smaller ones. Hold the card flat against the back of the phone, over the antenna, and a tap works first time.
Where the antenna sits depends on the phone. On iPhone it is the top of the back; NFC business cards on iPhone and Android covers both.
NFC on a card, in a phone and in a payment
Most confusion about NFC comes from treating these three as one thing. The radio is the same; the job is not. The NFC Forum names the modes a phone switches between: reader/writer mode for tags, and card emulation mode for payments and tickets.
| On a visiting card | In your phone | In a payment | |
|---|---|---|---|
| What it is | On a visiting cardA small memory tag inside the card | In your phoneA radio that can read tags or act as a card | In a paymentA bank card, or a phone acting as one, talking to a shop terminal |
| Power | On a visiting cardNone of its own. The phone's field powers it for the moment of the tap | In your phoneThe phone's battery | In a paymentThe terminal's field, or the phone's battery |
| What moves | On a visiting cardWhat is stored on it, usually one link | In your phoneWhatever the tag or the other device offers | In a paymentPayment data. In India a card tap of up to ₹5,000 needs no PIN; above that, extra authentication is required |
Why it matters for a visiting card. A card chip cannot start a conversation, ask your phone for anything, or move money. It waits, powerless, until a phone comes close, then hands over what it holds. On a Beeps Card that is one link to your profile, and the profile is where the useful part happens: saving your contact, sending a WhatsApp message, booking a slot or paying you by UPI.
Beeps Card is the visiting card that takes payments, bookings, reviews and leads - for Indian professionals. What an NFC business card is covers the whole picture, and how NFC business cards work follows one tap step by step.
What fits on a card chip: less than you think, more than you need
NXP's NTAG 213, 215 and 216, one family of chips used in NFC cards, hold 144, 504 or 888 bytes of your data. For scale, a profile link like the one in the box takes about 30.
That is enough because a card stores a link, not your details. The link is saved in a compact standard format in which common beginnings such as https:// are compressed to a single byte. Add the few bytes of framing around it, and a profile link like the one below takes a small share of even the smallest chip.
The same chips are rated for 10 years of data retention, and they can be locked read-only, so a passing phone cannot rewrite what is on them.
Type or paste any link. The count is worked out in your browser; nothing is sent anywhere.
31 bytes
- NTAG213 (144 bytes): 22% used
- NTAG215 (504 bytes): 6% used
- NTAG216 (888 bytes): 3% used
Counted as one standard link record on the chip, with its framing. Card makers can add other records, such as a contact card, which take more room.
NFC questions
What is the full form of NFC in a mobile phone?
The same: Near Field Communication. In a phone’s settings, the NFC switch turns on the radio that reads tags such as a visiting card and lets the phone pay at a shop counter by acting as a contactless card.
Sources: NFC Forum
Is NFC the same as RFID?
NFC is a short-range member of the same family. NFC devices work with the 13.56 MHz contactless standards many RFID cards use, including ISO/IEC 14443 and ISO/IEC 15693, but NFC adds the modes a phone needs: reading tags, acting as a card, and talking to another phone.
Sources: NFC Forum
Can an NFC visiting card take money from my phone?
No. A visiting card chip is a small memory tag: it has no power until a phone’s field reaches it, and all it hands over is what is stored on it, usually one link. Payments run through a bank card or a phone wallet, each with its own security, and in India a tap payment above ₹5,000 needs extra authentication such as a PIN.
Sources: NXP Semiconductors, Reserve Bank of India
Does NFC need the internet?
The tap does not. The phone reads the chip over the short radio link with no network at all. What the link opens, such as a profile page, then loads over mobile data or Wi-Fi like any other website.
How long does the data on an NFC card last?
NXP rates its NTAG 213, 215 and 216 chips for 10 years of data retention and 100,000 write cycles. A visiting card is written once or a few times, so the write limit never comes into play.
Sources: NXP Semiconductors
Sources
Facts about NFC come from the standards body, the chip maker, Google's Android documentation and the Reserve Bank of India, as published by them. Each was read on the date shown.
- NFC Forum, NFC Technology - Technical Overview. Checked .
- Android Developers, Near field communication (NFC) overview. Checked .
- NXP Semiconductors, NTAG 213/215/216: NFC Forum Type 2 Tag compliant IC with 144/504/888 bytes user memory. Checked .
- NFC Forum, NFC Release 15. Checked .
- Reserve Bank of India, FAQs - Card Transactions (updated 11 May 2023). Checked .
- Android Developers, NdefRecord (API reference). Checked .
Back to the start: the complete NFC business card guide.