The modern smartphone has long since ceased to be just a device for calls and has become a versatile tool that we carry in our pockets every day. Owners of the popular model Redmi Note 9 Pro often interested in the possibility of contactless communication, because it is one of the most popular features in everyday life. the presence of the NFC module (Near Field Communication) allows you to use the gadget as a means of payment, electronic access card or tool for fast data transfer.
However, despite the popularity of the technology, not all users know exactly where the necessary switches in the MIUI shell hide. Often it happens that the function is simply disabled by default or hidden in an unobvious place in the settings menu. In this article, we will discuss in detail how to activate the module, configure secure payments and use your smartphone to interact with other devices.
It's important to understand that using the technology right requires not only switching on the switchboard, but also understanding how the antenna works. The NFC antenna in the Redmi Note 9 Pro is located at the top of the case, next to the main camera module. This knowledge is critical when you put your phone to payment terminals or readers, because the wrong angle of inclination can lead to a failure of the readout. Let's take a Step-by-step look at all the nuances of working with this module.
Location of the module and verification of its availability
Before you start software setup, you need to make sure that your device is physically able to work with contactless tags.The Redmi Note 9 Pro model has an integrated chip, but some global versions or custom firmware may have software conflicts.
The antenna is physically integrated into the back cover or the top of the device's frame. To read cards or terminals successfully, you need to bring that area to the reader. If you put the phone in the middle or bottom, the contact may not be established, which is often mistaken for a breakdown or lack of function.
⚠️ Warning: Do not try to disassemble the phone to find a chip. The module is a miniature flat antenna soldered into a board or glued to the body, and does not require replacement in normal operating conditions.
Software checks are done through the system menu. If the settings do not include contactless payment or tags, this may mean that in your region of sale this version of the smartphone was shipped without the corresponding module. However, in most markets, the Redmi Note 9 Pro is a full-fledged device with support for all communication standards.
Activate NFC through the control panel and settings
The fastest way to enable the feature is to use the notification curtain. Swipe from top to bottom across the screen to open the Quick Access bar. Among the Wi-Fi, Bluetooth and flashlight icons should be an icon with the acronym NFC. If it is not on the first screen, scroll the list to the right or click the edit button (usually a pencil or three dots) to add a shortcut to a prominent place.
A deeper setup is done through the main system settings menu. You need to follow the path: Settings → Connection and Sharing → NFC. In some versions of the MIUI shell, the path may differ slightly, for example, the item may be immediately in the top settings menu or in the “Additional” section.
When you go to the menu, make sure that the activation slider is switched to the "On" position, and there are often additional options available, such as card emulation mode or tag reading. For standard use in payment mode, simply activate the main switch. The system will automatically start the necessary services in the background.
It should be noted that the constant activation of the module has little to no effect on the battery discharge rate. Modern chips consume energy only when interacting with the reader, being in sleep mode the rest of the time. So keeping the function on is convenient and safe for the autonomy of your Redmi Note 9 Pro.
Google Pay and Contactless Payment
The main reason users are looking for information about NFC is the ability to pay for purchases with a smartphone.To work with this feature on the Redmi Note 9 Pro, you need to install and configure the Google Pay app (or its current counterpart depending on the region and version of Android), the process of linking a bank card takes only a few minutes and requires an Internet connection.
After installing the app, add your bank card by following the instructions on the screen. You will need to take a picture of the card or enter the data manually, and then confirm your account ownership via SMS code or a bank call. It is important that the card supports contactless payment technology, which is now the standard for most banking products.
☑️ Payment setting
In the settings of the Google Pay application, make sure that the chosen payment means is set as the primary one, and the HCE (Host Card Emulation) emulation mode should be selected from the NFC settings menu of the phone, which allows the smartphone to pretend to be a regular plastic card for the terminal.
⚠️ Note: To work payments, the smartphone screen must be unlocked. Payment will not pass if the phone is turned off or in sleep mode without prior authorization of the owner.
When paying, bring the top of the phone to the terminal. You don't need to hold the device for long - vibration and sound signal will confirm successful data transfer. If the terminal requires PIN input (usually for amounts above a certain limit), enter your card code on the smartphone or terminal screen.
Data transfer and tagging
Short-range technology allows not only payment, but also data exchange between devices. On Xiaomi smartphones, this feature is often called Android Beam or integrated into the common exchange system. To transfer a contact, a photo or a link to a site, you just need to hold two smartphones with the back sides to each other.
In addition to transferring files between phones, the Redmi Note 9 Pro can read special programmable tags. These small stickers or key fobs can contain programmed scripts. For example, touching a phone to a tag on the desktop can automatically turn on the alarm clock, trigger a podcast, and put the phone in silent mode.
The list of possible actions when reading the label is extensive:
- 🔗 Automatic connection to the guest’s Wi-Fi network without entering a password.
- 🚗 Starting the navigator and turning on Bluetooth when landing in the car.
- 💡 Smart home management – turning on lights or changing temperature.
- 🌐 Instantly accessing the website or social network profile.
To record your own scripts on tags, you can use third-party apps from the Play Market store, such as NFC Tools, which turns your smartphone into a universal remote control of digital and physical processes around you.
Use of Mi Pay and alternative services
In some regions or for cards of certain banks, standard Google Pay may not work or be available, in which case Mi Pay, which is pre-installed on Xiaomi devices, comes to the rescue, allowing you to link cards of payment systems supported by local banks and make payments through terminals.
The Mi Pay setup process is similar to Google Pay, where you need to log in to your Mi Account, go to the Mi Wallet app and add a card, and the app will determine the type of card and suggest the appropriate security settings.
What is the difference between Mi Pay and Google Pay?
Before trying to link the card, it is recommended to check the current list of partners on the official website of the manufacturer or in the application "Wallet".
When you pay through Mi Pay, the algorithm of actions does not change: unlock the screen, hold the top of the case to the terminal and wait for confirmation, and the system will determine which service to use to conduct the transaction, if both are configured.
Table of compatibility and characteristics of the module
For a full understanding of the technical capabilities of your device, consider the specifications of the communication module installed in the Redmi Note 9 Pro. This data will help you understand what standards of cards and terminals your phone is compatible with.
| Parameter | Characteristics | Description |
|---|---|---|
| Communication standard | NFC Type A/B | Support for major communication protocols |
| Frequency | 13.56 MHz | Standard frequency for contactless payments |
| Emulation regimen | HCE | Emulation of a host card for Google/Mi Pay |
| Transmission speed | up to 424 kbps | Enough to transfer contacts and links |
| Location. | Upper part | Area next to the reading camera |
As you can see from the table, the specifications are fully consistent with the modern requirements of payment systems, and the data transfer speed is enough not only for payment, but also for fast pairing with accessories.
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The NFC specifications in Redmi Note 9 Pro fully comply with international standards for payment security.
If you plan to use your smartphone for corporate passes or complex access systems, make sure that the cards used are running at 13.56 MHz, as older cards at 125 kHz smartphones don’t read.
Diagnostics and troubleshooting
Despite the reliability of the system, users may encounter situations where the NFC stops working, most often a software failure or application conflict. If the terminal stops seeing the phone, try restarting the device, which clears the temporary cache of system services and often solves the problem.
Another reason could be a thick case or a metal plate for a magnetic holder in the car, the metal shields the signal, making communication impossible, remove the case and try to make payment again, and if that helps, then the problem was the physical obstacle.
⚠️ Warning: Metal rings and plates for car holders glued to the back cover are guaranteed to block the signal NFC. Use holders with a suction cup mount or remove the phone from the case.
Also check for system updates. Xiaomi regularly releases security patches and enhancements for the MIUI shell. Go to Settings → About Phone → MIUI version and click the Update Check button. Outdated software may contain errors in the communication modules.
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If NFC is unstable, try clearing the Secure Element app data in the application settings, which will reset the security module settings without losing any personal data.
In rare cases, the problem may lie in the damage of the antenna plume after a fall. If the software methods and removal of the case do not help, and the phone has previously been subjected to mechanical stress, you should contact the service center for the diagnosis of the hardware part.