Is it bad to catch a network far from the city? You can only call at the window, and the Internet goes away and comes back? The reason may lie in the Band 20 band, the low-frequency channel 800 MHz, which best passes through walls and extends over long distances. In Russia and Europe, this range is actively used by operators Beeline, MegaFon and Tele2 to cover remote areas.
Xiaomi smartphones (especially models for the Chinese market) often come with the Band disabled 20 By default, either because of regional constraints or because of firmware errors, you can turn it on in a number of ways: through the engineering menu, settings. SIM-maps or configuration file editing. In this article, we'll discuss all the working methods based on the features of the firmware. MIUI 12/13/14 HyperOS.
⚠️ Note: Not all Xiaomi models support the Band 20 physically. Before setting up, check the specifications of your device on the GSMArena website or in the documents for your smartphone. For example, the Redmi Note 10 Pro (global) supports the Band 20, and POCO X3 Pro (Indian version) - No.
Why Band 20 is important for a stable 4G
The 800 MHz (Band 20) band is a long-range mobile channel that operators use to cover rural, suburban and thick-walled buildings.
✅ Large coverage area: one tower covers an area 2-3 times larger than at 1800 or 2600 MHz.
✅ Better penetration: The signal passes through concrete, brick and even woodlands where high-frequency bands are jammed».
✅ Less interference: Unlike the congested Band 3 (1800 MHz), there are fewer subscribers, so the speed is more stable.
⚠️ In cities, operators often give priority to ranges 1800/2100/2600 MHz due to their high bandwidth. - Band 20 It can be used as a backup or for voice communications (VoLTE), far from megacities, it is the main channel. 4G. 📊 Your mobile operator?BeelineMegaFonTele2MTSYota Another If Your Xiaomi Doesn't Catch Network Where Other Phones Show 2–3 «The sticks are most likely the problem with the Band disconnected. 20. Next, we'll figure out how to activate it. 1: Through the Engineering Menu (the easiest method) This method works on most Xiaomi smartphones with firmware MIUI HyperOS, if the manufacturer has not blocked access to the engineering menu: 1. Open the phone application and enter the combination: ##4636## If the code doesn’t work, try an alternative: ##36446337## 2. In the menu that opens, select Phone Information (or Phone Information). 3. Scroll down to the Set preferred network type block and select the option: - LTE Only (if you need to force only) 4G) - LTE/WCDMA Auto (recommended for automatic switching between 3G and 4G). 4. Below, find a line. LTE Band (or Enable) LTE Bands and enter: 1,3,5,7,8,20,28,38,40,41 The main thing is to make sure that there is a number in the list. 20 (Band 20). If it is not, add it manually through a comma. 5. Press Set or Apply, then restart your smartphone. ☑️ Preparation for the Band setup 20Check out the smartphone model for Band support 20Make sure that SIM-Card activated Connect to Wi-Fi (in case of resetting) Battery charge at least 50%Completed: 0 / 4 ⚠️ Note: On some models (e.g, POCO F3 or Redmi K40) The engineering menu may be missing or blocked. In this case, move on to the next method. 2: Through settings SIM-cards (for MIUI 13/14 And HyperOS) In the new firmware versions, Xiaomi has added the ability to manually select ranges right in the interface: 1. Go to Settings. → SIM-maps and mobile networks. 2. Choose yours. SIM-card (if two of them). 3. Tap by Network Type (or Preferred Network Type). 4. Choose. 4G (recommended or Only 4G. 5. Below will be the option of Ranges LTE (or LTE Bands) -- click on it. 6. In the list, find the Band. 20 (800 MHz) and turn on the slider. If it's not there, then the firmware doesn't support manual configuration - use the method with an engineering menu or file editing. 💡If you have included the band 20 The network is gone completely, return settings to factory or try to disable other ranges (for example, Band). 38 or 40), conflictable. Method 3: File editing nv_item.bin (This method requires root rights and is suitable for power users. It allows you to force Band activation. 20, Even if the firmware is blocking it. 1: Getting root rights 1. Unlock the bootloader through the official Xiaomi website (instruction [here](https://en.miui.com/unlock/)). 2. Install custom recovery (for example, TWRP). 3. Squeeze Magisk to get root. Step 2: Editing the configuration file 1. With Root Explorer or Solid Explorer, go to the: /data/nvram/APCFG/APRDEB/nv_item.bin 2. Make a backup copy of the file (copy it to your computer). 3. Open the file in a hexadecimal editor (for example, HxD or 010 Editor). 4. Find the line responsible for the ranges LTE. She might look like this: LTE_BAND_CAPABILITY=0xFFFFFFFFF or 0x1E38 (binary: 0001 1110 0011 1000) 5. Change the meaning so that 20-And the bit was turned on, like activating the Band. 20 code can become 0x1E78. 6. Save the file and restart the smartphone. ⚠️ Attention: Incorrect editing nv_item.bin may result in loss IMEI If you've changed your phone, you can restore the backup file. What if you've lost the signal after you've edited it?1. Return the original file nv_item.bin backup. 2. Check if the settings have gone wrong. APN (Path: Settings → SIM-map → Access point (APN)). 3. Reset network settings in Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth. 4. If nothing helps, reflash your smartphone using the Mi Flash Tool. Method 4: Installation of custom firmware with Band support 20 If Xiaomi doesn’t support Band in the first place 20 (For example, the Chinese version of the Redmi Note 9 Pro), but hardware is able to work on this frequency, you can install global or European firmware. For example: - Xiaomi.eu - custom firmware with extended support for bands. - Official Global. ROM — official firmware for the international market: 1. Download the appropriate firmware from the site [xiaomifirmware.com](https://xiaomifirmware.com/) or [sourceforge.net/projects/xiaomi-eu-multilang-miui-roms](https://sourceforge.net/projects/xiaomi-eu-multilang-miui-roms/). 2. Unlock the bootloader (if not unlocked). 3. Install the firmware through TWRP Or Mi Flash Tool. 💡Castom firmware can void warranty and contain risks (e.g., blocking a Mi Account). Use them only if other methods have not helped. Table: Band support 20 In the popular models of Xiaomi Band Support 20 (800 MHz) Xiaomi notes 13/13 Pro ✅ Yes, all global versions support. Chinese versions only after firmware. 12 Pro+ ✅ Yes Included through the engineering menu or settings SIM. POCO X5 Pro ✅ Yes, the European version is activated by default. 10C ❌ No budget model without support 800 MHz. 11 Lite ⚠️ Partially only in the global version (M2101K9G). Frequent mistakes and their solutions 🔴 Problem: After the Band is included 20 Solution: Return range settings to factory bands or disable conflicting bands (e.g. Band) 38/40). 🔴 Problem: There is no option in the engineering menu LTE Band.Solution: Try a different code (##36446337##) Or use the editing method. nv_item.bin. 🔴 Problem: The operator does not use the band 20 in your region. Solution: Check the coverage map on the operator's website. For example, Beeline Band 20 operates in most regions of Russia, and MegaFon - selectively. 💡To find out what range your carrier is using in your current location, install the NetMonster or CellMapper app (Android). FAQ: My Xiaomi doesn't catch a network in the village, but other phones catch. Is it definitely because of the Band 20? Not necessarily: 📶 Does your model support Band 20 (see table above). 📱 Activated? SIM-map (sometimes operators block remote regions). 🔄 Is the regime only on? 4G If everything is fine, but the network is not, the problem is that Band 20 is disabled. Can I turn on Band 20 without root permissions? Yes, in most cases, there is enough engineering menu or settings. SIM-Root is only needed for editing system files (method 3). After the Band was included 20 The Internet has gotten slower. What do you do? It's okay if you're in a city: Band 20 It has less bandwidth than the band. 3/7/20. Return the settings to the factory or disable the Band 20 How to check that Band is a speed critical 20 Install the Network Signal Guru (Android) app or 4G Mark (iOS) The network information should display Band: 20 or EARFCN: 6400–6947 (bandband 20). Will the Band work? 20 Is it the Chinese version of Xiaomi after the firmware? Yes, but only if the hardware module supports this frequency. 12T Pro (Chinese version) after firmware on the global ROM start catching the Band 20, Redmi. 9A — No, because he's got another chip.