Owners of the popular Xiaomi Redmi 9 often face the need to quickly read a graphics tag, whether it’s a restaurant menu, a friend’s Wi-Fi password, or a link to an app. Unlike older versions of Android that required third-party software, modern MIUI shells offer built-in tools for this. However, due to the peculiarities of regional firmware and system versions, the standard algorithm of actions may not be obvious to the beginner.
Scanning two-dimensional barcodes has become an integral part of everyday smartphone use. On the Xiaomi Redmi 9, this process is implemented as conveniently as possible through a standard Camera application or system scanner. You do not need to search and install dubious software from the Internet, since the basic functionality completely covers the needs of the average user.
It's worth noting that recognition speed is directly dependent on the correct focus and lighting settings. If you're picking up a smartphone of this line for the first time, it may take you a while to get used to the location of the sensors and the interface, and we've prepared a step-by-step guide that will help you master this skill in a couple of minutes without too much theory.
Using a standard camera for scanning
The fastest and most obvious way to scan QR code on Xiaomi Redmi 9 is to use the built-in Camera app. The developers of MIUI integrated recognition algorithms directly into the viewfinder. You don't have to open separate menus or switch modes, just point the lens at the image.
To activate this feature, make sure that the camera settings have the appropriate switch on. Usually the system suggests turning on the Code Scanner when you first start, but if you missed this notification, you need to go to the settings menu (the gear icon or three bars in the corner) and find the item “Code Scanner” or “Google Lens”. After activating when getting stuck the tag, a yellow frame and a pop-up notification will appear on the screen.
⚠️ Warning: If nothing happens when you point the camera, check if the lens is covered with a protective glass or a case. Also, the algorithm may not work in low light or if the image on the screen of the source (another phone) is too low brightness.
It is important to keep your distance to read successfully. Don't bring your phone too close, otherwise the camera won't be able to focus. The optimal distance is 10-15 centimeters. If you use the Xiaomi Redmi 9 with one hand, try to hold the device as steady as possible, as even a slight shaking can knock down autofocus.
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Keep the camera perpendicular to the code. If you point at an angle, a distortion in the geometry of the square can prevent the software from properly decoding the information.
Configure and use the Mi Scanner application
The MIUI shell on Xiaomi Redmi 9 features a separate system application called the “Mi Scanner” that is a more functional version of a regular reader, as it can not only open links, but also recognize products, translate text and connect to Wi-Fi.
You can run the scanner in a number of ways. The fastest is through the control center. Swipe down to open the curtain and find the scanner icon. If it's not on the first screen, click on the edit button (usually a square with a pencil or three dots) and drag the widget to the main panel. Also, the shortcut is often located in the Tools folder on the desktop.
The application interface is divided into several tabs for different types of tasks:
- 📷 Code: Main mode for reading QR and barcodes of goods.
- 🛒 Product: a specialized mode for searching for analogues in online stores (useful for comparing prices).
- 📄 Document: allows you to scan the text and recognize it (OCR), Translate or save as an image.
- 🌐 Translation: Augmented reality mode, where text is translated directly into the viewfinder.
Using Mi Scanner is preferable when you need to scan the code from your computer screen, as it handles moir (rickety on the screen) better than a standard camera. In addition, there is a flashlight feature that automatically turns on at night, highlighting the tag.
Scanning through Google Lens (Google Lens)
Because the Xiaomi Redmi 9 runs on Android, Google services are necessarily on board. Google Lens is one of the most powerful computer vision technologies in the world. It's built into Google's app, Google Photos and desktop search widget.
To use this method, look up the Google search bar widget on your desktop. To the right of the microphone, there's usually a colored square camera icon. When you click on it, you'll be taken to the lens interface. This method is particularly good because it not only reads the link, but also analyzes the context: if it's a business card, it'll suggest you keep the contact; if the text is copied to the clipboard.
The advantage of Google Lens over a standard scanner MIUI It's about integrating more deeply into the search engine ecosystem, for example, if you point a camera at a pedigree plant or a landmark, it's going to try to find information about it, even if it's not a good idea. QR-It doesn't have code. It requires a stable Internet connection to work.
| Method | Speed of operation | Advertising | Additional functions |
|---|---|---|---|
| Camera (MIUI) | Tall. | No. | Basic |
| Mi Scanner | Medium | No. | Goods, translation |
| Google Lens | Depends on the network. | No. | Search, text, shopping |
Third-party apps from Google Play
Sometimes embedded tools may not work properly due to software failures or a specific encoding format (e.g., rare types of software). QR-In these cases, third-party solutions come to the rescue from the Google Play store, which often have more flexible sensitivity settings and scan history.
One of the most popular and trusted apps is Gamma Play’s QR & Barcode Scanner or similar high-rated solutions, and their main advantage is that there is no unnecessary advertising and a scan history that persists even after a phone reboot. This is handy if you accidentally close the link but want to return to it later.
When choosing third-party software, pay attention to the permissions requested. Code scanner only needs access to the camera. If the application requires access to contacts, microphone or location without an obvious need, this is an alarm. Data security on Xiaomi Redmi 9 should be a priority.
⚠️ Be very careful with the links received through QR-Attackers can encode the address of a phishing site that visually copies a bank or social media page. Always check the domain name in the address bar before entering a password.
Installing a third-party app is also useful if you plan to generate your codes. Many advanced scanners have a built-in generator that allows you to create a tag for your Wi-Fi or business card so that friends can count it as their phone.
☑️ Application security check
The Solution: Why the Camera Can't See the Code
Despite the advanced algorithms of Xiaomi Redmi 9, users sometimes face a situation where the camera simply ignores the image. Most often the problem lies in a software conflict or contamination of the optics.
The second common cause is a failure of the Google Lens service or the Camera app itself. In this case, cleaning the cache helps. Go to Settings → Apps → All apps, find Camera or Scanner, select Memory and click Clear Cache. This will not delete your photos, but reset temporary files of the program.
If the problem persists, check the camera resolution settings. In some cases (rarely) third-party launchers or themes may block viewfinder access. Try switching to the standard MIUI theme. Also make sure that the Security app doesn't prohibit the use of the camera for system services.
What to do if the code is damaged?
Safety and useful advice
Use of the QR-The two-dimensional codes carry not only links, but also commands to perform actions: add to contacts, connect to Wi-Fi or launch an application. Android always shows a preview of an action before it is performed – read carefully what the phone offers to do.
For frequent use of codes (for example, if you are a student and you need to constantly show a digital pass, or you pay through terminals often), it is convenient to display the scanner widget on the main screen. On MIUI, this is done by long tapping through the empty desktop space, selecting "Vidgets" and searching for "Scanner." Select the "Button" format for instant access.
Remember, the read quality depends on the resolution of the source screen. If you scan the code from another smartphone, increase the brightness of its screen to maximum. Matte protective films at the source can also create glare that prevents the Redmi 9 camera from recognizing the pattern.
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The built-in MIUI and Google Lens fully cover 99% of user needs, and installing third-party applications is only justified for working with corrupted codes or specific generation tasks.