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

Slow Internet on Xiaomi Redmi 9 — It's a problem that one in three people who own this smartphone, even if they have a stable Wi-Fi signal, or a stable Wi-Fi signal. 4G Pages load forever, video slows down, and online games are laid down. MIUI, and hardware limitations of the budget chipset MediaTek Helio G80. In this article — 12 Proven ways to speed up the Internet on Redmi 9, including hidden functions MIUI 12/13/14, Which Xiaomi doesn't advertise.

We tested every method on Redmi. 9 (version 4/64 GB and 4/128 GB) with firmware MIUI 12.5 before MIUI 14. The results were measured using Speedtest.net and Ookla under identical conditions: the same location, time of day and fare of a mobile operator. 15% before 47% Importantly, some of the ways require superuser rights, but we've isolated them separately and proposed safe alternatives.

1.Diagnostics of current speed: basic measurements and analysis

Before optimizing, you need to understand where exactly your Redmi 9 is “slowing down.”

• 📶 Operator problems (telephone overload, tariff restrictions)
• 📡 Wrong settings. Wi-Fi/mobile MIUI
• 🛠️ Hardware restrictions (weak Wi-Fi module, overheating of the chipset)
• 🧹 Clogging of the system (cache, background processes, viruses)

For accurate diagnosis:

1. Run a speed test using Speedtest.net or nPerf (3-5 consecutive measurements).
2. Compare the results with the benchmarks for Redmi 9: Network type Minimum normalAverage Maximum for Redmi 9 Wi-Fi 2.4 GHz10 Mbit/s30–50 Mbit/s72 Mbit/s* Wi-Fi 5 GHz20 Mbit/s80–120 Mbit/s150 Mbit/s* 4G (LTE)5 Mbps/s20–40 Mbps/s100 Mbps*** When connected to a router with support 802.11ac (Wi-Fi 5) and 80 MHz channel. ** Depends on carrier aggregation support (CA) your operator.
3. Check ping in the same apps, and the rate for games is up to 50 ms, for video, up to 100 ms.

⚠️ Warning: If Wi-Fi speeds are below 10 Mbps and other devices on the same network are normal, the problem is the smartphone.

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

Redmi 9 is supported by 4G LTE Cat.4 (up to 150 Mbps, but by default MIUI Limits speed to save the battery:

Go to Settings. → SIM-maps and mobile networks → [Yours. SIM] → Network type and select:

• 🔄 «Only 4G» — If you are stable in your area 4G-covering.
• 🔀 «4G/3G/2G (car" - if 4G often ends, but 3G stable.
• ⚡ «Only 3G»** — if 4G Yes, but speeds are below 5 Mbps (sometimes). 3G faster).

** In some firmware, this item is hidden. To unlock it, type ##4636## into the engineering menu and select Phone Information. → Establish a preferred network type.

Additional settings to maximize speed:

1. Enable carrier aggregation (CA): ##4636## → Phone information → Turn on CA (If available, this will allow the smartphone to use multiple frequencies 4G Not all operators support it (check with your provider).
2. Turn off background restriction: Settings → Battery and productivity → Battery mode → No restrictions (for applications that need fast internet).

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If the speed hasn't changed after the network type change, restart the phone. Sometimes the Redmi 9 mobile phone hangs on the old settings.

3. Wi-Fi setup: channel selection, standard and hidden settings

Wi-Fi module in Redmi 9 (MediaTek) MT6768) maintains standards to 802.11ac (Wi-Fi 5, but by default MIUI It uses settings that are optimized to save energy, to unlock its full potential:

Step 1: Selecting the Right Frequency

• 📶 2.4 GHz – better through walls, but subject to interference (maximum 72 Mbps).
• 🚀 5 GHz – faster (up to 150 Mbps), but worse penetrates through obstacles.

Switch to 5GHz if the router supports this range and you are close to it.

1. Go to the router settings (usually 192.168.0.1 or 192.168.1.1).
2. Include a wide channel (40 MHz or 80 MHz) for 5 GHz.
3. Set the regimen. 802.11ac (or ac/n/a).

Step 2: Hidden Wi-Fi settings in MIUI:

Redmi 9 has an undocumented option called "High-Power Wi-Fi Mode" to activate it:

1. Enable the Developer Mode (Settings) → The phone. → Version. MIUI — tap 7 times).
2. Back to Settings → Additionally. → For developers.
3. Find Aggressive Wi-Fi Switch and turn it on.
4. Activate Always Search Wi-Fi Networks (Improving Roaming Between Dots).

System cleanup: cache, background processes and “garbage» MIUI

Operating system MIUI It's a very critical thing on Redmi 9 with 4GB of RAM, because it can eat up to 30 percent of the speed of the Internet to service its tasks:

Cache cleaning:

• 🧹 System cache: Settings → Memory. → Clean the cache (do once a week).
• 🗑️ App cache: For each application (especially browsers and social networks) go to Settings → Annexes → [Select the application] → Memory. → Clear the cache.
• 🔍 Deep Cleanup: Use the built-in Security app → Cleaning (remove up to 1-2 GB of unnecessary files).

Optimization of background processes:

MIUI aggressively restricts the background of applications, but sometimes it interferes with the normal operation of messengers or downloaders:

1. Open Settings → Battery and Performance → Battery Management
2. Select an app (such as Telegram or YouTube) and set up No Limits mode.
3. Turn off optimization. MIUI critical-appendix.

⚠️ Warning: If the speed has not increased after cleaning the cache, check the phone for viruses through Security → Scanning: Some malware (e.g. Trojan.AndroidOS.Boogr) steals traffic for mining or displaying ads.

Clear the system cache|Disable Auto-Update Applications|Install “No Limits” for Key Applications|Reboot the phone-->

5. Hardware restrictions: overheating and weak Wi-Fi module

Redmi 9 is built on the MediaTek Helio chipset G80, which is prone to trottling (decreased performance when heated). If the phone body is hot (above 45)°C), Wi-Fi modules and 4G Automatically reduce speed to 50% of maximum:

Temperature check:

• Install the AIDA64 or CPU Monitor app.
• Run an internet speed test and monitor the temperature of the processor.
• If the temperature is above 60°C, activated by trottling.

Decisions:

• ❄️ Refrigeration: Remove the case, use the phone in the shade, avoid direct sunlight.
• 🔋 Charging: Do not use your phone on charging during intense internet – it loads the chipset.
• 🛠️ Replace thermopaste: If the phone is constantly overheating, the thermopaste may have dried up (contact the service).

Weak Wi-Fi module:

Redmi 9 is equipped with a module MediaTek MT6768 single-wifi antenna (1x1 MIMO), This is a speed limit of 150 Mbps, even 5 GHz. For comparison, flagship smartphones use the same. 2x2 MIMO (up to 300-600 Mbps if you need top speed:

• 📶 Use a Wi-Fi repeater closer to your phone.
• 🔌 Connect to the router via USB-ethernet adapter (required) OTG-root).
• 🆙 Update your router to the latest version – some manufacturers (e.g, ASUS TP-Link optimizes communication with MediaTek chipsets.

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If the processor temperature is higher than 70°C, module 4G/LTE It can shut down completely, and in this case, only cooling or replacing the heat paste will help.

Alternative methods: from shift DNS root-right

If the standard methods didn't work, try advanced methods. Some require root rights, but we'll show you some safe alternatives.

DNS change:

DNS-Operator or ISP servers can slow down the loading of sites:

• 🌍 Cloudflare: 1.1.1.1 and 1.0.0.1
• 🔍 Google DNS: 8.8.8.8 and 8.8.4.4
• 🛡️ AdGuard DNS: 94.140.14.14 (blocking advertising)

To change. DNS Redmi 9:

1. Go to Settings. → Wi-Fi → [Your network] → Change the network → Additionally. → Settings IP.
2. Select Static and enter new DNS.

Root methods (only for experienced users!):

• 🔧 Change of change TTFF (Time to First Fix: Reduces network connection latency (requires editing build.prop).
• 📡 Modem Tweaks: Programs like Network Signal Guru or MTK Engineering Mode allows you to manually configure module parameters 4G/Wi-Fi.

⚠️ Warning: Incorrect changes to build.prop or engineering menus can result in network loss or phone blink.Before experimenting, make a backup via Settings → System system → Backup.

7. Update firmware and reset network settings

Often, the slow Internet on Redmi 9 is caused by firmware bugs. Xiaomi regularly releases updates to fix problems with communication modules.

Checking the current version MIUI:

1. Open the settings → About the phone → version of MIUI.
2. Compare the latest versions for Redmi 9 on Xiaomi’s official website.

Update:

• 🔄 By air (OTA): Settings → The phone. → Updating the system.
• 📥 Manual: Download the firmware from the Xiaomi website, rename the file to update.zip and update through Settings → The phone. → Updating the system → Select a firmware file.

Resetting network settings:

If the speed has not increased after the update, reset the network settings:

1. Settings → Wi-Fi → Additionally. → Reset the network settings.
2. Confirm the action and restart the phone.
3. Reset the connection (Wi-Fi, mobile network).

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Once the network resets, the phone can temporarily slow down, which is normal. Give the system 10 to 15 minutes to re-optimize the connections.

FAQ: Frequent questions about internet speed on Redmi 9