How to increase the speed of the Internet on Xiaomi Redmi 9: from simple settings to hidden features

The slow internet on Xiaomi Redmi 9 is a problem that even new device owners face, with dozens of reasons ranging from smartphone settings to operator congestion, and in this article, we’ll look at all the possible ways to speed up the internet, from basic checks to hidden MIUI features that few people know about.

The Redmi 9 (including the Redmi 9A/9C/9T) is a low-end MediaTek Helio G35/G80 processor that, if optimized incorrectly, can artificially limit network speed. MIUI also activates traffic-saving features that often work against the user, and we'll show you how to turn off those restrictions and get the phone to use 4G/5G and Wi-Fi networks to the maximum.

Important: Before you change your settings, check the real speed of your Internet through services like Speedtest or FAST.com. Write down the results so you can objectively assess the effect of each method.

1. Checking the current speed and diagnosing problems

Before you optimize your settings, you need to understand where the connection is going to brake. Redmi 9 has diagnostic tools built in, but they're hidden in the engineering menu. Here's how to use them:

• 📶 Signal Level Check: Go to Settings → SIM-maps and mobile networks → Your name. SIM-map → Signal level, if the reading is lower -100 dBm – a problem in the operator’s coverage area.
• 🔄 Speed test in the engineering menu: enter the code ##4636## in the phone dialer, select Phone Information and scroll to the Network Type block, LTE or HSPA+).
• 📊 Traffic Analysis: C Settings → Connections and sharing → Using data, check which apps are consuming traffic in the background. Often the brakes are the culprits, social networks or instant messengers.

If you see in the engineering menu that the phone is connected to the network HSPA+ instead LTE, signifier, SIM-card or tariff is not supported 4G. In this case, no settings of the smartphone will not help - you need to contact the operator.

⚠️ Note: ##4636## opens a service menu where you can accidentally change your critical settings. Do not edit the settings in Battery Information or Usage Statistics sections - this can cause malfunctions in your phone.

2. Optimization of mobile Internet settings (4G/5G)

By default, MIUI limits mobile internet speed to save battery power, and you can manually remove these restrictions:

1. Incorporation of maximum speed LTE: Go to Settings. → SIM-maps and mobile networks → Your name. SIM-map → Type of network. 4G (preferably or only 4G (The Auto option often chooses slow networks. 3G/2G.
2. Turn off traffic savings: Go to Settings → Battery and Performance → Battery Savings. Turn off the option to Limit Background Data Use.
3. Activation of VoLTE and VoWiFi: In Settings → SIM-maps and mobile networks → Name. SIM-Enable voice calls through the cards LTE (VoLTE and Voice calls over Wi-Fi (VoWiFi) improve connection stability, which indirectly affects speed.

Critical setting for Redmi 9: Network Type menu may not have 4G Only option. In this case, select 4G/3G/2G (auto), but immediately after that type in the dial code ##4636## → Phone Information → Set your preferred network type → LTE only. This will force you to block the connection to slow networks.

Select the network type “Only 4G"|Turn off traffic savings in battery settings|Activate VoLTE and VoWiFi|Signal level check (should be higher) -100 dB)|Update APN-profile (see next section)-->

3. Update APN-profile

APN (Access Point Name is the "address" that connects the phone to the operator's Internet. APN may limit the speed to 3G, even if SIM-card 4G.

How to Update APN to Redmi 9:

1. Go to Settings. → SIM-maps and mobile networks → Your name. SIM-map → Access points (APN).
2. Click on the three dots in the top right corner and select Reset to default values.
3. If that doesn’t work, create a new APN manually (see below for options for popular carriers).

APN parameters for major Russian operators (2026):

• 📡 MTS: Name: MTS APN: Internet.mts.ru Type of authentication: PAP Protocol APN: IPv4/IPv6
• 📡 Beeline: Name: Beeline APN: internet.beeline.ru Username/password: beeline
• 📡 MegaFon: Name: Megafon APN: Internet type APN: default,supl
• 📡 Tele2: Name: Tele2 APN: internet.tele2.ru MMS-protocol: WAP 2.0

⚠️ Note: If after the change APN The Internet is gone, return the default settings and restart the phone. Some carriers (e.g. Yota or virtual ones) MVNO) require special parameters - specify them on the official website.

💡

After the update APN speed has not increased, try to temporarily disconnect SIM-card (in settings or physically), then turn on again.This will reset the session of connection to the network operator.

4. Wi-Fi Acceleration: Channel Choice, Standard, and Hidden Settings

On Redmi 9, Wi-Fi is often slower than it could be due to automatic selection of congested channels or an outdated connection standard.

4.1 Selection of the optimal Wi-Fi channel

By default, the router chooses the channel itself, but often makes the mistake of finding the free channel:

1. Install the WiFi Analyzer app (available on Google Play).
2. Run the scan - the application will show the load of channels 2.4 GHz and 5 GHz.
3. In router settings (192.168.0.1 or 192.168.1.1), manually select a minimum load channel (e.g., 6 or 11 for 2.4 GHz).

4.2 Forced use of 802.11ac (Wi-Fi 5)

Redmi 9 supports Wi-Fi 5 (802.11ac), but can connect by default over the outdated 802.11n protocol.

1. Activate Developer Mode: Go to Settings → About Phone and click on MIUI Version 7 times.
2. Go back to Settings → More → For developers and find the option Aggressive Wi-Fi Switch (or Wi-Fi standards).
3. Choose 802.11ac or 5GHz only (if your router supports 5GHz).

If there is no option in the developer menu to choose the Wi-Fi standard, use an alternative method:

adb shell settings put global wifi_frequency_band 52

This command forcibly includes 5 GHz support (ADB and USB debugging enabled are required).

5. Cleaning the system from background processes and cache

MIUI is known for aggressively cacheing data and storing background processes that can steal traffic and slow down the Internet.

• 🧹 Cleaning the app cache: Go to Settings → Annexes → App management: sort apps by cache size and clean it for the most voracious (YouTube, Chrome, Facebook, etc.).
• 🚫 Restriction of background activity: C Settings → Battery and productivity → Battery management select No restrictions only for critical applications (messengers, banks). For other applications, set Limit background activity.

Resetting network settings:

If nothing helps, reset your network settings: Settings → System → Settings Reset → Reset your Wi-Fi, mobile data, and Bluetooth settings.

Pay special attention to auto-update apps (Google Play, social media), which can download data in the background while occupying a channel, and disable auto-update in the settings of Google Play and Mi App Store.

⚠️ Note: Do not clear the cache of system applications like Android System or MIUI System – this can cause phone malfunctions, and do not limit background activity for Google Play Services, otherwise push notifications will stop working.

6. Alternative methods: from changing the DNS to firmware

If standard methods don’t help, try these advanced techniques:

• 🌐 Shift. DNS: Default is used DNS your carrier or provider, which may be slow: 1.1.1.1 (Cloudflare – for maximum speed; 8.8.8.8 (Google DNS) — stability; 76.76.76.76 (Yandex DNS) — For Russian websites. DNS You can use Wi-Fi settings (click on the network name) → Change the network → Additionally. → Settings IP → Static → DNS 1/DNS 2). 📱 Disable Dual Apps: Dual Apps creates additional processes that can slow down the network. → Annexes → Dual Apps. 🔧 Fastboot Firmware: If the problem is software limitations MIUI, Refuse the phone to the global version of the software (for example, MIUI Global instead MIUI This will remove regional speed restrictions. Instructions: Download the firmware from the official Xiaomi website. Unpack the archive and run through the Mi Flash Tool in Fastboot mode. Critical point: when you run through Fastboot, all the data on the phone will be erased. Pre-backup through Settings → System system → Backup or manually copy files to PC. 💡Shift. DNS — The easiest way to speed up the internet 10–30% Start with this method if standard settings don't work. 7. If software methods have not yielded results, the problem may be in the "hardware": 📶 Damaged. SIM-Map: Microcracks or wear of contacts SIM-Cards can cause communication breakdowns, try inserting the card into another phone or replacing it in the operator's cabin. 📡 Faulty module Wi-Fi/4G: If the phone is not catching the network well, even where other devices are working normally, the antenna module may be damaged. It's a typical Redmi problem. 9 You can test this by wrapping your phone in foil, if the signal goes completely off, the module is in good working order. 🔋 Worn-out battery: Under discharge below 20% Helio G35/G80 It automatically limits performance, which also affects Internet speed. < 80%), Use the engineering menu to diagnose hardware problems (##4636##) phone app INFO SAM (Detailed information about communication modules). FAQ: Frequent questions about speeding up the Internet on Redmi 9 🔹 Why Internet Speed on Redmi 9 Lower than other phones on the same network?This could be due to: Helio CPU limitations G35/G80, which, when overheated or high load, reduces the network speed. Settings MIUI Default (traffic savings, background restrictions) Outdated firmware (check updates in Settings) → The phone. → System Update: Start by turning off traffic savings and resetting network settings. 🔹 How to check if my husband supports me SIM-map 4G/VoLTE? Check methods: Call the operator and check if it is activated on your tariff 4G. Put it in. SIM-card to another phone with support 4G — If the internet is faster, the problem is with Redmi. 9. On the engineering menu (##4636##) Check the Network Type line. If it says LTE, piece 4G maintained. 🔹 Can I speed up the internet on Redmi? 9 Yes, all the methods in this article (except for Fastboot firmware) work without root. APN and DNS. Disable traffic savings. Forced network selection 4G. Cache cleaning and limiting background processes. Root may only be needed to deep optimize the system core, but it is risky and lacks warranty. 🔹 Why After Updating MIUI Is the Internet slower? That's a typical Redmi 9 problem after the updates. MIUI may reset the settings APN or DNS. The firmware may have new restrictions on background traffic, the operator has not yet adapted the network to new software (relevant to regional firmware). → System system → Resetting settings → Reset your Wi-Fi and mobile data settings and reset APN. 🔹 Which apps are best to use for a speed test on Redmi 9? Recommended tools: Speedtest by Ookla is the most accurate, but requires a stable signal. FAST.com is a simple test from Netflix, shows download speeds. Internet Speed Meter Lite – displays real-time speed in the notification panel. Network Signal Info – shows detailed information about the network (signal level, connection type). Before the test, disable the VPN and close all background applications.