How to turn on the top speed of the Internet on Xiaomi Redmi Note 9: from Wi-Fi to Wi-Fi 4G

You have noticed that Xiaomi Redmi Note 9 slows down when downloading files, YouTube videos are constantly buffered, and mobile Internet speed is far from the 100 declared by the provider.+ Mbps? The problem is not always in the tariff or router – often the fault are hidden smartphone settings, which by default limit bandwidth.

In this article you will find 7 Proven ways to overclock the Internet on Redmi Note 9 (including the Pro, Pro Max and Pro models, and 9S), From basic settings to hidden engineering menus, we're going to take a look at how to optimize for mobile (4G/LTE), So for Wi-Fi, and also learn to diagnose bottlenecks with built-in tools MIUI. All methods have been tested on current firmware versions (including: MIUI 14 hyperos).

Important: speed doesn't just depend on your phone settings. If you're on a 10 Mbps tariff, even the perfect configuration won't produce 100 Mbps. But 80 percent of the time, users are not getting half the money they can get, and that's just what's possible.

1. Checking the current speed: basic test before settings

Before you optimize, you need to understand what we're working with: use accurate tools to measure speed, rather than trusting subjective sensations ("seems to slow").

Best services for testing on Redmi Note 9:

• 📊 Speedtest.net (official app) - shows ping, download and recoil. Choose your city's server for accurate data.
• 🌍 nPerf – tests not only the speed, but also the stability of the connection, which is critical for online games.
• 📱 Built-in test MIUI: Go to Settings. → SIM-maps and mobile networks → Network speed (not available on all firmware).

Conduct 3 tests in a row in different conditions:

1. Wi-Fi next to the router.
2. On the mobile network (4G) roomly.
3. On the mobile network on the street (where the signal is maximum).

Compare the results to your carrier's rate, for example, if you have a 150 Mbps "Unlimited Maximum" from MTS and the test shows 20 Mbps, it's time to act. If the difference is less than 30%, optimization may not have a noticeable effect.

⚠️ Attention: Speed tests consume traffic (up to 50MB per measurement) Disable background apps (e.g. YouTube or TikTok) so they don't distort results.

2. Optimizing the mobile Internet (4G/LTE)

Mobile network on Redmi Note 9 often not working at full capacity due to incorrect settings APN, Power saving restrictions or an outdated modem version.

Adjustment APN (point)

Wrong parameters APN They can slow down 40 to 60 percent, and even if the network catches, the data is transmitted through the narrow neck».

How to set up:

1. Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Access points (APN).
2. Click on the current profile (usually the operator name) and select Delete APN.
3. Create a new one. APN with your operator's parameters, like MegaFon:

For other operators (Beeline, Tele2, Yota) you can find the settings on their official websites. After saving, restart the phone - the changes will apply only after the modem restarts.

Inclusion of the “Only” regime 4G»

Default Redmi Note 9 Uses automatic network selection (2G/3G/4G), Which can lead to "slow-motion" 3G even if 4G. Forced priority:

Path: Settings → SIM-maps and mobile networks → Preferred type of network.

Select Only. LTE (or 4G). If this item is missing, use the engineering menu:

##4636##

In the menu that opens, go to Phone Information and in the Set preferred network type section, select LTE only.

⚠️ Attention: In mode Only 4G If your carrier does not support this technology, calls will become impossible.

Make sure that the operator supports VoLTE

Record the current APN settings

Check balance (some operators block VoLTE when the balance is negative)

Make a backup of contacts (in case of failure)

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Update of operator configuration

Operators periodically update network settings (e.g., add support for new frequencies). 4G). These updates come in the form of configuration files, but sometimes they need to be installed manually.

How to update:

1. Go to Settings → About the phone → System update.
2. Click on the three dots in the top right corner and select Operator Configuration Update.
3. If the item is missing, check for firmware updates – sometimes new configurations come along with them.

Once updated, restart your phone and repeat the speed test, which in some cases can increase to 20-30 Mbps (especially in regions where operators have recently launched new towers).

3. Wi-Fi acceleration: from channel selection to hidden settings

If the mobile internet is overclocked, but Wi-Fi is still crawling, the problem may lie in the settings of the router or the smartphone itself. There are several hidden parameters on the Redmi Note 9 that affect speed.

3.1. Optimal router settings for Xiaomi

Most routers use automatic channel selection and bandwidth by default, which is not always optimal. Manual setting can increase speeds by 30-50%.

If your router supports MU-MIMO, Turn on this feature – it allows you to share data with multiple devices at the same time, which is critical for families with 5+ gadgetry.

3.2 Hidden Wi-Fi settings on Xiaomi

V MIUI There are non-obvious parameters that affect speed:

• 🔄 Wi-Fi Power Saving Mode: Turn it off in Settings → Wi-Fi → Additionally. → Power saving Wi-Fi: The option on reduces speed when inactivity.
• 📶 Frequency bands: If your router supports 5 GHz, connect to this network - it is less loaded. → You can also enable Smart Switching (automatic choice between 2.4 and 5 GHz).
• 🔒 Static IP: Sometimes. DHCP The router gives you a "slow» IP. Set a static address manually (e.g. 192.168.1.100) in the connection settings.

💡

If Wi-Fi speeds drop when you move away from your router, try turning on Beamforming (if supported) in your router settings, which focuses the signal toward your device, increasing stability.

Diagnostics of interference

In apartment buildings, Wi-Fi networks of neighboring routers cause interference. To find a free channel, use the applications:

• 📡 WiFi Analyzer (Shows real-time channel loading).
• 🛡️ NetSpot – builds a heat map of the signal, helping to find the best location for the router.

If there are no free channels, try:

1. Switch to 5 GHz (less busy band).
2. Reducing the transmission power of the router (in its settings) is paradoxical, but sometimes it reduces the level of interference.

4. Engineering menu: hidden opportunities for advanced

For high-end users willing to take risks, there is an engineering menu (#4636##) where you can fine-tune network settings. Beware - incorrect changes can lead to loss of communication.

What can be changed:

• 📡 Band Selection: Forced to select frequencies 4G, Supported by your operator (e.g. Band 3, 7, 20 for MTS).
• 🔄 Network Mode: Enable LTE-only or GSM/WCDMA/LTE auto.
• 📊 Signal Strength: View the current signal level in dBm (optimum: from -70 before -90).

Example of Band change:

1. In the engineering menu, select Phone Information.
2. Scroll down to Set Preferred Network Type and select LTE only.
3. Go back and find it. LTE Enter the frequencies supported by your operator (e.g. 3.7.20 for Europe).
4. Press Set and restart the phone.

⚠️ Attention: Not all frequency combinations are stable. If the network goes down after the change, reset the Restore defaults or reset the network in the main settings.

5. Software Methods of Accelerating the Internet

If the hardware settings did not give a result, try software solutions: from cleaning the cache to using it. VPN (Yeah, sometimes it speeds up the connection!).

5.1 Cleanup DNS-cache and reset

Cache scored DNS It can slow down the opening of sites:

1. Go to Settings → Applications → Application Management.
2. Find Chrome (or another browser) and click Storage → Clear the cache.
3. For a complete network reset: Settings → System system → Resetting settings → Resetting Wi-Fi, Mobile Network and Bluetooth.

After reset, you will have to re-enter Wi-Fi passwords, but this often solves problems with “hung” connections.

5.2 Use of alternatives DNS

DNS-The servers of the operator or provider may be overloaded. DNS from Google or Cloudflare:

• 🌐 Google DNS: 8.8.8.8 and 8.8.4.4.
• ☁️ Cloudflare DNS: 1.1.1.1. and 1.0.0.1.

How to change DNS on the Redmi Note 9:

1. Go to Settings. → Wi-Fi.
2. Click on your network. → Change the network → Additional parameters.
3. In the field DNS 1 and DNS 2 enter addresses (e.g. 1.1.1.1 and 8.8.8.8).

For the mobile network DNS Changes to applications like 1.1.1.1: Faster Internet by Cloudflare).

5.3. VPN throttle-by-pass

Some operators artificially limit the speed of certain services (for example, Torrent or YouTube). VPN Could help get around it.

Recommended VPN For the Redmi Note 9:

• 🛡️ ProtonVPN – free rate with good speed.
• ⚡ Warp (from Cloudflare) – Minimum speed losses.
• 🌍 NordVPN – paid, but with servers optimized for streaming.

It's important: VPN It's not going to speed up the Internet if it's on the part of your tariff, it's only going to help with artificial throttling.

6. Hardware causes of slow internet

If the software didn't work, the problem could be the hardware, the antennas, the modem, the battery, and we'll figure out how to diagnose and fix it.

Check antennas and communication module

Redmi Note 9 has two antennas for the 4G (spread-out MIMO), But they can get damaged by falling or getting moisture:

• 📱 Look at the signal level in the engineering menu (##4636## → Signal Strength? If the value RSRP worse -110 dBm, communications are unstable.
• 🔍 Visually inspect the connector SIM-Cards – oxidation of contacts worsens the signal.
• 🛠️ If the phone fell, the antenna plume may have gone (disassembly is required).

If the signal is weak only in certain places (e.g. in an elevator or basement), the problem is not with the phone, but with the carrier’s coverage.

6.2 Effect of the battery on Internet speed

Under 15% MIUI automatically activates a power saving mode that limits the modem's performance:

• 🔋 Turn off the Adaptive Battery in Settings → Battery and productivity → Battery settings.
• ⚡ Enable High Performance in the same section (reduces uptime but removes restrictions).

If the battery is worn out (capacity below 70%), it may not provide enough current for the modem. → Battery → Battery status or AccuBattery application.

Overheating and its effect on the network

Heating above 45°The Redmi Note 9 starts trottling, which affects the modem as well:

• 🧊 Close background apps (especially games and video players).
• 📴 Remove the cover - it can block the heat sink.
• 🔄 Reboot your phone to reset temperature restrictions.

For a long-term solution, replace the thermopaste (in the service center) or use a cooling rack.

7.Alternative solutions: from firmware to external modems

If nothing has worked, radical measures remain: flashing, replacing the communication module or using external devices.

7.1. Flashing on custom software

Stock-stock MIUI Sometimes speed limits due to Xiaomi optimizations. Alternative firmware (such as LineageOS or Pixel Experience) can give you an increase:

• ⚙️ Install. TWRP (customization).
• 📱 Sweat the custom core with optimized modem drivers.
• 🔄 Return to the runoff if the speed has not improved (castom firmware is not always stable).

⚠️ Warning: Flashing will void warranty and may result in a brick phone.Do backup via the Mi Flash Tool before starting.

External modems and USB-web-based

If the built-in Redmi Note 9 modem is weak (for example, in remote regions), connect USB-Modem or use your phone as an access point for another device:

• 📡 Buy it. 4G-modem (e.g. Huawei) E3372) And plug it in through. OTG-adapter.
• 🔄 Enable modem modem modem in Settings → Access Point and modem and distribute the Internet to a laptop.

This is true for trips or places with poor coverage where the external modem antenna picks up the signal better.

Calling the service centre

If all methods have been tried and the speed is still low, the problem may be:

• 📡 Qualcomm Snapdragon 662 modem malfunction (Redmi Note 9 Pro – Snapdragon) 720G).
• 🔌 Damage. RF-circuit (transmission-receiving-transmission path).
• 🛠️ Programmatic failure at the level IMEI baseband.

The service centre may:

• Re-sweeten the modem (if the problem is soldering).
• Switch baseband (radio module) separately from the main firmware.
• Replace the antenna unit.

The cost of diagnosis - from 500 rubles, repair - from 1500 rubles (depending on the problem).

FAQ: Frequent questions about Internet speed on Redmi Note 9