How to turn on the maximum speed of the Internet on Xiaomi Redmi 9

Owners of the popular Xiaomi Redmi 9 smartphone often face a situation where the declared support for 4G networks does not provide the expected speed of loading pages or streaming video. This may be due not only to the operator’s tariffs, but also to the factory settings of the MIUI operating system, which are optimized by default for energy saving, rather than for maximum modem performance.

The right configuration of network settings can do wonders, turning a slow E or 3G into a stable 4G+. In this guide, we will examine not only the standard methods, but also the hidden features of the engineering menu available for this model of the MediaTek processor.

Before making changes, you need to make a basic diagnosis of the current state of the connection, which will help you understand whether the problem lies in the hardware, SIM card or software constraints.

• 📶 Check the signal indicator: If you have less than two divisions, the software settings may not help without changing the location.
• 🔄 Reboot the device: banal reboot often resets the hanging network processes.
• 💳 Make sure that SIM-card 4G/LTE and installed in the correct slot (usually the first one).

⚠️ Attention: Before changing the settings APN or modem parameters, make sure to write down or photograph the original values, which will allow you to quickly return everything as it was, if the settings lead to complete lack of communication.

Basic setting of the APN access point

The most effective way to increase mobile internet speed is to manually adjust the access point (APN), and operators often provide standard settings that do not take into account the features of modern data networks.

First, you need to get into the settings menu. Go to the Settings path. → SIM-maps and mobile networks → Choose yours. SIM → Access points (APN). Here you'll see a list of existing profiles. Don't edit them directly, you'd better create a new one.

Click the New Access Point button or the Plus icon. In the menu that opens, you will need to enter the data corresponding to your operator. The key parameter here is the APN Type field.

In the APN type field, the default value is often,supl. To activate high-speed protocols, you need to add a dun parameter to the dun. The bottom line should look like this: default,supl,dun. This will allow tethering and often unlock faster operator gateways.

After you have entered all the data, remember to click the menu (three dots in the corner) and select Save. Then be sure to activate the created profile by ticking next to it.

Engineering menu and selection of LTE ranges

A unique feature of MediaTek-based smartphones, which include Redmi 9, is the availability of an engineering menu, a powerful tool that allows you to force your phone to LTE Only mode or select specific frequency bands.

To get into this menu, open the Phone app and type the combination ##3646633#. If the code doesn't work, your firmware version may block that entry, and then you'll need to install a special dealer app from the Play Market store.

In the interface that opens, go to the Telephony → Network Setting → Band Mode tab. Here you will see a list of supported bands (Band). By default, there are ticks everywhere, which causes the modem to constantly scan the airwaves, spending resources and sometimes jumping between frequencies.

For maximum speed, it is recommended to leave only LTE bands. However, be careful: if you remove 2G/3G support and 4G coverage in your zone disappears, the phone will not see the network at all, and you will not be able to call or receive SMS.

⚠️ Note: Experiments in the engineering menu can cause the phone to stop catching the network. If after the reboot the connection does not appear, perform a full reset of network settings or return the ticks at all points of Band Mode.

Changing DNS servers to speed up response

Often, the slow speed is not felt because of a bad channel, but because of the slow response of domain name servers (DNS). Standard. DNS The provider can process requests for a long time, creating a delay when opening sites.

In the Android operating system 9 and above, which is installed on Redmi 9, there is a built-in function “Private”. DNS». It allows you to encrypt. DNS-Requests and use fast servers of third-party providers.

To set up, go to Settings → Connection and Sharing → Private DNS. Select the DNS Host Name mode and enter the address of one of the fast services.

• 🌐 Google’s dns.google servers are highly stable.
• 🌐 1dot1dot1dot1.cloudflare-dns.com — They often provide minimal ping.
• 🌐 dns.yandex.ru - a good choice for users from Russia, quickly updates the cache.

Once you enter the address, click Save. Changes take effect instantly. You can check the result by opening a heavy website or running an online game. If the speed has dropped or the sites have stopped loading, return the mode to Auto.

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Use the Speedtest or Fast.com app before and after the DNS change to objectively estimate the speed gain and ping. Write down the results for comparison.

Optimizing Wi-Fi Connection

If the Internet problem is observed when connecting to the home network, the settings of the mobile operator have nothing to do with it. Xiaomi Redmi 9 supports dual-band Wi-Fi, but by default can give preference to the congested range of 2.4 GHz.

In the Wi-Fi settings (Settings → Wi-Fi → Click on your network name), look for “IP settings” or “Advanced.” Make sure that the Wi-Fi Assistant is enabled, but with caution.

This feature automatically switches the phone to mobile Internet if Wi-Fi seems to it “slow.” In an unstable router, this can lead to permanent connection breaks. Try turning off “Mobile Network Switch” in this menu.

Also, you should pay attention to the parameter “Use random”. MAC-Some older routers may not work properly with this security feature introduced in Android 10 «MAC-Device address" and reconnect.

Reset network settings and clear cache

If software failures have been accumulating for a long time, no manual setup can help, and then a radical but safe method is required: resetting your network settings, which will not delete your photos, contacts or applications.

It will only clear all stored Wi-Fi passwords, Bluetooth pairs, and return the mobile settings to factory settings. This is done through the Settings menu → Connection and Sharing → Reset Wi-Fi, mobile networks and Bluetooth → Reset settings.

Once rebooted, the phone will be clean in terms of network protocols. You will have to re-enter Wi-Fi passwords, but this often solves the problem of sticking at low speeds.

Additionally, you should clear the cache of the system application "Settings" and "Phone". Go to Settings → Apps → All applications → Find "Settings" → Memory → Clear the cache.

⚠️ Note: Resetting your network settings will remove all saved passwords from Wi-Fi routers.Make sure you remember the password from your home network before performing this operation.

Effects of MIUI shell and background processes

The MIUI shell is known for its aggressive battery saving, often at the expense of application background activity and connection stability.

To prevent this, go to Settings → Battery and Performance. Select Unlimited or Classic mode, but not Economy mode. In economy mode, processor frequency and communication module activity are artificially limited.

Also check the settings for specific applications that need fast internet (such as navigators or instant messengers). From the Apps menu, find what you want, go to Saving Charge, and select No Limits.

And remember, Game Turbo, if you add your apps to it, it will prioritize network resources for them, pushing back the background loads.

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A comprehensive approach, including setting up APN, DNS and turning off aggressive energy savings, gives the best result for the Redmi 9.

Check for system updates regularly. Xiaomi engineers periodically release patches that improve the modem’s performance with specific carriers.

Frequently Asked Questions (FAQ)