HomeDigital SecurityNFC in Mobile Phones: A Practical Guide to Contactless Payments

NFC in Mobile Phones: A Practical Guide to Contactless Payments

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Having a phone with contactless payment is no longer exclusive to high-end devices. By 2026, smartphones starting at R$ 692 already offer integrated NFC technology, allowing anyone to make purchases by tapping the device on the payment terminal. However, many users still don’t know how to activate the function, are unsure if their device is compatible, or fear security issues. This practical guide addresses these three concerns with clear instructions and verified technical data.

What is NFC and How Does Contactless Payment Work?

NFC stands for Near Field Communication. It is a wireless data transmission technology that operates over very short distances — a maximum of 10 centimeters between devices. The standardization follows the ISO/IEC 18092 standard, published by the International Organization for Standardization.

In fact, the technology emerged between 2002 and 2004 in Japan, where mobile phones were already used as digital wallets before the popularization of smartphones. NFC works through an emitter and receiver chip that exchange encrypted information when they are close enough. In the case of payments, the phone emulates a virtual credit or debit card, transmitting a token — a unique temporary code — to the payment terminal.

Consequently, the real card data is never shared with the terminal. The terminal only receives this disposable token, which cannot be reused for another transaction. Moreover, the entire communication happens in less than a second, making the process faster than inserting a physical card or typing passwords.

How to Identify if Your Phone Has NFC

Before setting up any digital wallet, you need to confirm that the device has an NFC chip. Android phones with version 6.0 (Marshmallow) or higher that have integrated NFC hardware can perform contactless payments. In the Apple ecosystem, all iPhone models since the iPhone 6, launched in 2014, come with NFC built-in.

Still, not every mid-range Android smartphone includes the technology. Therefore, manual verification is essential.

Where to Check in Settings

The path to confirm the presence of NFC varies by manufacturer but follows a similar pattern on most Android devices: