Modern smartphones of the brand Xiaomi and sub-brand Redmi have long ceased to be just devices for making calls, having turned into full-fledged digital wallets. Contactless communication technology NFC (Near Field Communication) allows you to make purchases with one touch, replacing plastic cards and change. However, users often have difficulties with the initial setup of the module or choosing a payment system, especially in the changing financial services market.
In this article we will look in detail at how to activate the chip, link a bank card and ensure the security of transactions on your device. You will learn about the differences in the operation of payment systems and understand why some terminals may not read the signal. For owners of budget models, it is important to understand that the presence of a logo on the box does not always guarantee full functionality in your region without additional settings.
The process of turning your gadget into a payment instrument takes only a few minutes, but requires attention to security details. We will look at the algorithm of actions from enabling the module in the settings to making the first purchase in the supermarket. Follow the instructions to avoid common mistakes and enjoy the convenience of contactless payment.
Checking hardware support and enabling the module
The first step before setting up payment is to make sure that your device is physically equipped with the required module. Although most modern models of the line Redmi Note and flagship Xiaomi Mi have a built-in chip; in the most budget segments this function is sometimes missing. You can check the availability of hardware support through the engineering menu or simply by looking at the specifications in the official store.
If the module is present, it must be activated in the system. Go to Settings and use the search bar at the top of the screen by entering the query “NFC”. This is the fastest way to find the desired switch, since the menu location may differ in different versions of the shell MIUI or HyperOS. An alternative path lies through the section Connection and sharing, where the corresponding toggle switch is located.
After turning on, the NFC icon may appear in the notification shade for quick access. It is important to note that for payment to work, the smartphone screen must be unlocked. Some users mistakenly believe that it is enough to simply bring the switched off phone to the terminal, but this only works in specific emulation modes that are not used for banking transactions.
- 📱 Make sure that the back cover of the smartphone does not contain metal plates or magnetic holders that block the signal.
- 🔋 Check the battery charge: if the energy level is critically low, the system may automatically turn off the communication module for savings.
- 🛡️ Install a reliable screen lock method (PIN code, fingerprint), since payment applications will not launch without it.
⚠️ Attention: If you are using a protective case with metal inserts or a holder ring on the back panel, remove it before paying. The metal shields the antenna, usually located in the upper part of the case, which is why the terminal does not recognize the signal.
Selecting and installing a payment application
The mobile payments market is dynamic, and the choice of software depends on the type of your bank card and the region of use. Historically, the de facto standard was the service Google Pay (now Google Wallet), which supported Visa and Mastercard cards. However, in the current realities, users from the Russian Federation often have to turn to alternative solutions, such as Mir Pay or applications of specific banks.
To install the application, open the store Google Play or an alternative catalog if the standard one is not available. Download the official application of the bank that issued your card or a specialized wallet. When you first launch, the system will ask for permission to access NFC and location - agree with them, otherwise the contactless payment function will not work.
You must go through a verification procedure inside the application. This usually involves entering card details manually or scanning it through a smartphone camera. After entering the data, the bank will send an SMS code to confirm account ownership. Only after successful linking the card will appear in the list of available means of payment.
Sequence of actions:1. Open the bank/wallet application.
2. Click “Add card.”
3. Enter the number, expiration date and CVV code.
4. Confirm the transaction via SMS from the bank.
If you have cards from different banks, set the application of the bank whose card you use most often as the main default in the NFC settings.
Setting up the default card and priorities
When you have several cards linked to your smartphone, the system must know which one to use when presenting to the terminal. In the NFC settings there is an option “Contact payments” or “Default payment”. This is where you select the application that will launch automatically when a reader is detected.
If you want to use Mir Pay Instead of a standard wallet, go to the NFC settings and in the “Payment Application” item, select the desired app from the list. If this is not done, the phone may try to launch Google Wallet, which in some cases will not carry out a transaction with a card of a certain payment system, which will lead to an error on the terminal.
It is also worth paying attention to the “Payment without unlocking” function. For security reasons, it is disabled by default, and the phone requires verification with a fingerprint or code before transferring data. You can enable simplified mode in the NFC security settings, but this increases the risks if the device is lost.
| Setting parameter | Recommended value | Impact on operation |
|---|---|---|
| Default application | Your main bank / Mir Pay | Determines which wallet opens automatically |
| Payment without unlocking | Disabled (for security) | Allows you to pay with the screen off, but less secure |
| Sound when payment | Enabled | Gives audio confirmation of successful data transfer |
| HCE services | Active | Allows card emulation through the phone processor |
Don't forget to periodically check these settings after major system updates Android or the manufacturer's shell. Sometimes resetting the network settings or updating the software can return the default values by changing the priority application for payments.
The correct choice of the default application in the NFC settings solves 90% of problems with the phone not seeing the terminal or opening the wrong wallet.
Payment process in a store: step-by-step algorithm
The moment of payment itself is intuitive, but has its own technical nuances that are worth knowing about. Approach the terminal and make sure that the contactless payment icon is lit on the cashier’s screen or the amount has already been entered. Unlock your smartphone and bring its top (where the antenna is located) to the reading area.
Hold the phone motionless for 1-2 seconds. There is no need to press the device close to the glass of the terminal; a distance of 1-2 centimeters is sufficient. If the reading is successful, the phone will vibrate and a check mark or the words “Paid” will appear on the screen. The terminal will also emit a characteristic sound signal.
In cases where the purchase amount exceeds a certain limit (usually 1000 rubles, but depends on the bank and terminal settings), the system may request you to enter the card PIN code directly on the terminal. This is a standard security procedure, and the smartphone here acts only as a data transmitter.
- 📍 Look for the NFC logo on the terminal: it is usually located on the right or at the top of the cashier's screen.
- 📳 Wait for the phone to vibrate: this is the main signal that the data has been transferred successfully.
- 💳 For large purchases, be ready to enter the PIN code on the terminal keypad.
⚠️ Attention: Do not remove the phone from the terminal too quickly until a confirmation signal appears. Premature interruption of the connection may lead to the transaction getting stuck, and the cashier will have to cancel the operation manually.
☑️ Ready to pay
Diagnostics of problems and common errors
Despite the mature technology, Users sometimes encounter situations where payment does not go through. The most common reason is a malfunction of the application itself or temporary problems on the bank’s side. First of all, restart the wallet application and check the availability of the Internet, although it is not always necessary for the transaction itself, tokens can be updated.
Another common problem is related to incompatibility of frequencies or communication protocols in older terminals. If the terminal is very old, it may not support modern encryption standards used by new smartphones. In this case, only using a physical card will help. Xiaomi. In this case, only using a physical card will help.
It is also worth checking whether airplane mode is enabled or whether data transfer is disabled in global settings. Sometimes clearing the cache of the Google Pay or Mir Pay application through the app management menu helps. If all else fails, try removing the card and adding it again.
What to do if the terminal says “Communication error”?
Try to bring the phone to the other side (rarely, but the antenna may be displaced), check if the phone is discharged, and make sure that the card is not blocked by the bank for suspicious activity.
Interfaces of banking applications and Android settings menus may change with updates. If you do not find the described menu item, use the search inside your phone settings or contact your bank's help to clarify the current path.
Questions and answers about using NFC
Is it safe to pay with my phone if I lose it?
Yes, it is safer than losing a plastic card. To make a payment, you must unlock the device (fingerprint, face or code). In addition, you can remotely block access to payment services through the “Find Device” service or call the bank.
Does NFC work if the phone’s battery is completely drained?
On most modern smartphones Xiaomi i Redmi the payment function is disabled when critical charge level. However, some models support emergency payment mode for a short time after switching off, but you should not rely on this.
Is it possible to pay for purchases if there is no Internet?
Yes, NFC technology uses secure tokens that are stored in the phone's memory. For a one-time payment, the Internet is not required, but periodically the application requires a connection to the network to update security keys.
Why does the phone heat up during payment?
Slight heating in the antenna area is a normal physical process when the radio module is operating. If the heating is strong, check if there are any heavy background applications running, and make sure that the case does not interfere with heat dissipation.
How to remove a linked card from your phone?
Go to the wallet or bank application, select the desired card in the list and click “Delete” or the trash can. You can also clear application data in the Android settings, which will delete all linked cards at once.