Xiaomi’s modern smartphones and Redmi’s sub-brand are no longer just call devices, but are now feature-rich gadgets that focus on home keys, bank cards and travel tickets. One of the most useful features to provide this level of comfort is NFC technology. The acronym that is increasingly seen in the specs of a new device is Near Field Communication.
This near-to-contact technology allows data to be shared between devices in close proximity to each other, meaning that users can instantly pay for purchases in stores, read tags, or quickly connect gadgets without complex settings. Understanding how this module works in the MIUI or HyperOS ecosystem will help Xiaomi owners maximize the potential of their smartphone.
Many users buy a phone without even knowing that they have a powerful automation tool in their pocket. The NFC module in Redmi's budget models often runs at the same frequencies as the flagships, but may have software limitations from the manufacturer. To understand the nuances of the chip, learn how to activate it and use it for secure payments is a task that we will now deal with in detail.
Principle of operation and physical features of the module
Near Field Communication is based on high-frequency radio signals. In Xiaomi smartphones, it's a miniature antenna that most often fits into the back cover or the battery compartment. When you bring the phone to a payment terminal or other tag, the electromagnetic field of the reader activates the chip in the phone, a process that takes a fraction of a second and doesn't require an Internet connection for the moment of connection.
It's important to understand that the technology's range is extremely small. It's only a few centimeters, usually between 0 and 10 cm. This is not a disadvantage, but a critical security feature. Attackers can't read data from your device at a distance, as is theoretically possible with Bluetooth or Wi-Fi. To make a successful operation, a smartphone must practically touch the reader.
There are several modes of operation that support the operating system Android based on MIUI. Active mode allows the phone to generate the radio field and power passive tags, such as advertising stickers or smart locks. In passive mode, the smartphone itself becomes a label that reads the external terminal, which happens when you pay in the store. There is also a card emulation mode, when the phone fully copies the behavior of the plastic card.
⚠️ Warning: Metal cases or magnetic holders in the car can shield the antenna signal. If payment does not pass, try to remove the case or change the position of the smartphone relative to the terminal.
The power consumption of the module in sleep mode is almost zero. It begins to actively consume energy only at the time of connection. So users do not need to worry that the enabled NFC function will significantly reduce the battery life of their Redmi Note or Xiaomi Mi. Constant search for devices in this frequency range does not occur, activation is only on request of the application or when you bring it to the reader.
How to check for and activate NFC in Xiaomi
Not all smartphone models, even from popular brands, have a short-range communication module, especially in the low-end segment, where manufacturers can save on components. Before trying to set up payment, you need to make sure that the chip is physically present in your device. The easiest way is to speculate on the official website or in the box from your smartphone.
If documentation is not available, you can check for the feature through the software menu. To do this, open the notification curtain and find an icon that says NFC. If such an icon is not available in quick access, go to the main system settings. The path usually looks like this: Settings → Connection and Sharing → NFC. The presence of this menu item ensures that the hardware part in the phone is present.
For a deeper check, you can use the engineering menu or special applications from the Google Play Store, such as NFC Check, which diagnoses the state of the antenna and the reader. If the application says "NFC is not available", then most likely, your phone modification does not have this module physically, and you can not programmatically activate it.
☑️ Checking of operability NFC
Once a function is detected, it needs to be activated. In modern HyperOS and MIUI shells, the switch is often hidden inside the submenu. Once the slider is turned on, the system can suggest choosing the default application for payment. This is a critical step, which we will talk about in the next sections. Without choosing the right emulator, the payment system will not start.
Contactless Payment Settings: Google Pay and Mi Pay
The main reason users need NFC in Xiaomi and Redmi smartphones is the ability to pay with their phone. Google Pay has long been the de facto standard. However, due to changes in payment systems in some regions, users are having to look for alternatives. The process depends on which service you plan to use.
Google Pay (or its equivalents like Google Wallet) requires Google Play services, which is the standard for global firmware versions. You need to add a bank card to the Google Wallet app. After that, in the NFC settings (Settings → Connection and Sharing → NFC → Pay by touch), you need to select “Google Pay” as the default application, which will give the system a command to transfer tokenized card data through this service.
Mi Pay is a little more complicated. It's Xiaomi's own payment system, which is not supported in all countries and not by all banks. If your region supports Mi Pay, you can add the card directly to the Security or Mi Wallet app, and the advantage of this method is that it works at the system level and can be less dependent on Google services, which is true for Chinese versions of firmware.
| Parameter | Google Pay / Wallet | Mi Pay | Banking Applications (Mir Pay) |
|---|---|---|---|
| Dependence on Google | Tall. | Low. | Absent. |
| Bank support | Global | Limited. | Local (RF/CIS) |
| Difficulty setting up | Low. | Medium | Medium |
| Stability of work | Tall. | Medium | Tall. |
In the current conditions, the applications of specific banks emulating cards are the most relevant for users from Russia. MIR. The principle of their work is similar: the application uses NFC-a module for transferring payment tokens, however, to make it work correctly, in the settings NFC You will need to choose this application as the main one for each use, or adjust automatic rules.
⚠️ Note: When installing applications for payment from third-party sources (APK-Always check the developer’s digital signature, using modified versions of banking applications can result in account locks.
Using NFC for automation and smart home
In addition to payments, Xiaomi’s NFC technology offers a wide range of opportunities to automate everyday tasks. With special tags (NFC Tags), which are inexpensive and sold as stickers, you can turn your phone into a universal remote control. Xiaomi’s Smart Home ecosystem is a great friend of this feature.
You can program a tag to let a phone touch a specific set of apps on your desktop, turn on an alarm, or send a message, for example, a tag stuck at the headboard of the bed can put the phone in Do Not Disturb mode, turn off the lights in the room (if you have Yeelight smart bulbs), and run a podcast.