How to check Band 20 support on Xiaomi smartphones: 5 working ways

Band 20 (800 MHz) is key to stable mobile network coverage in Russia, Europe and many CIS countries, providing better signal penetration in buildings and on the outskirts of cities where 4G/LTE base stations operate at low frequencies. If your Xiaomi does not catch the network in the basement, elevator or outside the city, the problem may lie in the lack of support for this range.

But how do you know exactly if your smartphone supports Band 20? Manufacturers don't always list this information in specs, especially on global versions of devices. In this article, we'll look at 5 proven ways to check, from standard settings to hidden engineering menus and specialized applications. You'll also learn why even with support for range, the network may not work, and what to do about it.

Verification through official model specifications

The easiest, but not always accurate, way is to look at the specifications of your Xiaomi model.The manufacturer often specifies supported ranges in the documentation, but there are nuances:

• 📄 Xiaomi official website: Go to your model page (e.g. Redmi Note 12 Pro)+) under “Technical characteristics" → "Network and communication. Look for a line. LTE FDD or 4G Bands.
• 🛒 Partner stores: on the Mi Store, Svyaznoy or M.Video sites, the product card sometimes has detailed data on the support of ranges.
• 🔍 Databases: Services like GSMArena or FrequencyCheck collect data from all models, including regional versions.

⚠️ Note: One Xiaomi model may have several modifications for different markets. X5 Pro for India (index) IN) The Global version and the Global version are often distinguished by supported ranges. Always check the exact article of your device (located on the box or in the About phone settings). → Model).

2.Use of the engineering menu (#4636##)

The hidden engineering menu is a powerful tool for network diagnostics, and it is on all Xiaomi smartphones (except some models in China), but access to it may be limited.

1. Open the phone app and enter the combination: ##4636##
2. In the menu that appears, select Phone Information (or Phone Information).
3. Scroll down to the Set preferred network type block, showing all supported communication standards, but not specific ranges.
4. To see active ranges, go back to the main menu screen and select Information about the SIM-map → Signal Strength. Some firmware shows the current Band (e.g., the band) here, B20).

🔹 Limitations of method:

• ❌ Nana MIUI 14+ The engineering menu can be blocked (produces a Connection problem or invalid error). MMI code).
• ❌ Not all models show the current Band – often only the signal level is displayed.
• ❌ The menu only works with active SIM-card.

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If the engineering menu doesn’t open, try entering the code through the Google Phone app (you can install from the Play Market).

3. Network analysis applications: NetMonster, LTE Discovery

Specialized utilities allow you not only to check the support of the Band 20, but also to analyze the signal quality in real time.

Instructions for NetMonster:

1. Install an app from the Play Market.
2. Run it and wait for the network to be determined (the antenna icon will turn green).
3. In the main window, look for the LTE Band string – the current range (e.g. B20) will be indicated here.
4. To see all supported bands, go to Device Info → Supported Bands.

⚠️ Note: If there is a supported range in the list B20, But the smartphone doesn't connect to it, and the problem may be the operator's settings. For example, Tele2 and Iota are actively using Band 20, and MTS and Beeline are less likely. → Network operators.

4. Verification through ADB-Teams (for advanced users)

If standard methods don't work, you can use Android Debug Bridge (ADB), a tool for debugging Android devices, which requires connecting your smartphone to your computer, but provides the most accurate information.

What you need:

• 🖥️ Computer with installed ADB-driver.
• 📱 Included debugging by USB on a smartphone (Settings) → The phone. → Version. MIUI → 7 times to tap according to the version → return to → For developers → Debugging by USB).
• 🔌 USB-cable (preferably original).

Step-by-step:

1. Connect your smartphone to your PC and confirm the debugging permission on the device screen.
2. Open the command line (Windows) or terminal (macOS/Linux) in the folder with the platform-tools.
3. Enter the command to check supported ranges: adb shell su getprop gsm.lte.rrc.bands If the root right is not available, try: adb shell dumpsys telephony.registry
4. In the output, look for supportedBands or LTE Bands. For example: supportedBands=[1, 3, 5, 7, 8, 20,...] Here 20 is the Band 20 you're looking for.

Hardware inspection: test SIM-Band 20-enabled card

The most reliable, but time-consuming method is the test with SIM-The card of the operator who actively uses the Band 20:

• 📡 Tele2 is the main operator deploying the network at 800 MHz.
• 📡 Iota – uses Band 20 to cover subway and remote areas.
• 📡 MTS and Beeline - support the range, but less often it is used.

How to run the test:

1. Put it in. SIM-Tele2 card or Yota in a smartphone.
2. Go to Settings → Mobile Network → Network Mode and select LTE Only (to exclude switching to 3G/2G).
3. Open a network analysis app (like NetMonster) and check if the device is connected to Band 20.
4. If you don’t have a connection, but other bands (like B3 or B7) work – your Xiaomi doesn’t support Band 20.

💡 Useful advice: To keep the experiment clean, test in a place where the Band 20 is definitely there, such as in the Moscow or St. Petersburg subway (where Tele2 has deployed coverage) or on the outskirts of cities.

Make sure that SIM-card activated|Insert the "Only" mode LTE"|Install an application for network analysis (NetMonster/LTE Discovery)|Located in the Band coverage area 20|Turn off Wi-Fi for clean test-->

6.Why doesn't the smartphone connect to the Band 20 even though it supports it?

The situation where Xiaomi in specs supports the Band 20, but does not actually catch the network at this frequency, is common.

• 📵 Operator-Blocked: Some Xiaomi firmware (especially Chinese ones) have bandwidth limits, even if the hardware supports them.The solution is to flash the global or European version MIUI.
• 🔄 Priority Other Ranges: Smartphone can 'stick' to busier Band 3 or Band 7 by ignoring B20. Manually block unnecessary ranges through the Engineering Menu or Network Signal Guru app.
• 📡 Firmware problems: In older versions MIUI (Below 12) there were bugs with the definition of ranges. Update the software through Settings → Updating the system.
• 🔧 Hardware defect: Damage to antenna module or contacts SIM-The card may result in loss of support for certain ranges.

⚠️ Note: On Xiaomi smartphones with MediaTek processors (for example, Redmi Note 11 or Poco) M4 Pro) sometimes helps reset network settings. → Mobile network → Reset mobile network settings. After rebooting, the device rescans the available ranges.

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If your Xiaomi is not connecting to the Band 20, check the firmware and operator settings first. 80% of the time, the problem is solved by a software update or change. SIM-map.

FAQ: Frequent questions about Band 20 on Xiaomi