How to speed up the Internet on Xiaomi Redmi 9: from basic settings to hidden chips MIUI

Xiaomi Redmi 9 owners often face the problem of slow Internet — pages load forever, video slows down, and online games are laid. The reasons can lie in both smartphone settings and external factors, from an overloaded network of the operator to outdated firmware. In this article, we will analyze all possible ways to speed up the Internet, from simple (change network mode) to advanced (manual setting of APN and DNS optimization).

It’s important to understand that Redmi 9 supports 4G LTE (in some regions, LTE-A with channel aggregation), but its hardware platform (MediaTek Helio G80) does not always cope with modern loads. In addition, MIUI by default limits background traffic to save battery power, we will teach you to bypass these restrictions without harming the phone.

Let’s start with the diagnosis – it will help to understand where exactly the “bottleneck”: in the smartphone, SIM-And then we go to the practical steps that will give you a 10 to 200 percent increase in speed depending on the initial situation.

1. Diagnostics of the problem: why is the Internet slowing down?

Before you set something up, identify the source of the slowdown.

• 📶 Check the signal level: Redmi 9 status bar shows the sticks of the network. If there are less than 3, there is a problem with the operator's coverage. Try moving closer to the window or going outside.
• 🔄 Compare the speed on other devices: connect to the same network another phone or laptop. If there is fast Internet, it is Redmi 9's fault.
• 📊 Measure your speed: Use apps like Speedtest by Ookla or nPerf. Pay attention to: Ping (latency): >100 MS - Problems with stability. Download/Upload: lower speed 5 Mbps 4G — something.
• 🔧 Check the settings. APN: Sometimes operators update access options, and the phone keeps using the old ones.

If the speed drops only in certain applications (for example, YouTube or Telegram), the problem may be their cache settings or MIUI limitations.

⚠️ Note: If after the update MIUI The internet is gone, check if the settings are broken. IMEI. To do this, dial *#06# – if zeros are displayed instead of the number, you will need to restore using Engineering Mode (instruction below).

2. Basic network settings: what can be changed without risk

Start with simple actions – they take a minute, but often have a noticeable effect:

• 🔄 Reboot the phone: trivial but working. Prolonged work without rebooting leads to an accumulation of network errors in the Android kernel.
• 📶 Turn on the “Only” mode 4G»: Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Type of network. 4G (recommended or Only LTE (if there is such a clause).

This will disable the switch to slow 3G/2G, which MIUI sometimes does to save power.

Change the DNS mode

1. Open Settings → Connections and Sharing → Private DNS.
2. Select the host name of the private provider DNS and enter dns.google or 1dot1dot1dot1.cloudflare-dns.com.

This will speed up the opening of sites due to optimized servers Google or Cloudflare.

Turn off the Traffic Savings

Settings → SIM-map → [yours SIM] → Saving traffic

Test the changes with Speedtest, and if you're getting less than 10 percent of the speed, then you can go to the following methods.

3. Mobile Internet Optimization: APN, IMEI and Hidden Settings

If the basic methods didn't work, it's time to dig deeper. APN settings are a key parameter that operators often update, but the phone doesn't always pull up automatically.

To manually configure APN on Redmi 9:

1. Go to Settings. → SIM-maps and mobile networks → [yours SIM] → Access points (APN).
2. Click on your current profile (usually one) and select Delete APN.
3. Create a new profile using your operator's settings. For example, for MTS: Name: MTS INTERNET APN: Internet.mts.ru Proxy: Port not installed: Username not installed: mts Password: mts Authentication type: PAP or CHAP APN type: default,supl
4. Save and activate the new APN, then restart the phone.

If the internet is gone after that, check the IMEI (as mentioned above).

1. Click on ##4636## and select Phone Information.
2. Scroll down to Set Network Type and select LTE only.
3. If the IMEI is lost, restore it through Engineering Mode (requires root rights or service access).

⚠️ Attention: Incorrect editing APN You can lose communication completely. Always save your original settings (picture the screen) before you change. If you're not sure, contact the operator's office for the right settings.

The profile name is the same as the operator |

APN is introduced without errors (registration is important!)|

Type APN contains "default" |

Password and username completed (if required)|-->

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

If the Internet problems only occur when connecting to Wi-Fi, either the router or the settings of Redmi 9 are to blame.

• 🔄 Forget the network and connect again: Go to Settings → Wi-Fi. Click on your network. → Delete (or Forget) Connect again by entering a password.
• 📶 Turn on the "Mode" MOD» Wi-Fi (Hidden Function) MIUI): Activate Developer Mode (click on) 7 once-on MIUI In Settings → About the phone. Go back to Settings. → Additionally. → For developers, find Aggressive Switching. Wi-Fi/Mobile and turn it on.

This will make the phone switch faster between Wi-Fi and the mobile network at a weak signal.

Change the Wi-Fi standard

1. In the router settings (usually 192.168.1.1), look for the Wireless section.
2. Set 802.11n/ac mode (disable the outdated 802.11b/g).
3. Select a 40 MHz channel (instead of 20 MHz) for more bandwidth.

Optimal router settings for Redmi 9:

A critical feature of Redmi 9 is that when you connect to Wi-Fi 5 GHz with a channel width of 80 MHz, you can experience instability. If the speed jumps, go back to 40 MHz or switch to 2.4 GHz (but at a slower speed).

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If you have Wi-Fi connected after the changes, but the Internet is not working, check the IPv6 settings on the router. Sometimes turning it off solves the problem.

5. System cleanup: cache, background processes and MIUI "junk"

MIUI is known for aggressively cacheing data and triggering background processes that eat up traffic and slow down the network, and cleaning up will free up resources:

• 🧹 Clear the app cache: Go to Settings → Annexes → App management. sort by cache size and clean it up for Chrome, YouTube, Facebook and other "gluttonous" apps.
• 🚫 Limit background activity: In the same app settings, select AutoRun. Turn off AutoRun for unnecessary programs (especially social networks and instant messengers).
• 🔄 Reset network settings (last resort): Go to Settings → System and device → Resetting settings → Reset network settings. Confirm action. This will delete all stored Wi-Fi and mobile network settings.

Remove "systemic debris"

1. Use the built-in Security → Cleanup app.
2. Choose Deep Cleanup and delete unnecessary files.

If you live in a low-coating area, consider:

• Purchase of a 4G repeater (signal amplifier).
• Connecting home Internet with distribution via Wi-Fi.
• Change the operator to the one who has better coverage in your region (check the coverage maps on the sites of MTS, Beeline, MegaFon).

If nothing helps, wait for the next update (usually bugs with the network are fixed within 1-2 weeks).