How to speed up the Internet on Xiaomi Redmi 8: from basic settings to hidden chips MIUI

Slow internet on Xiaomi Redmi 8 is a common problem that can arise both due to hardware limitations of a budget smartphone, and due to incorrect settings. MIUI In this article, we will examine all possible causes of brakes, from banal cache cache to hidden modem parameters that Xiaomi does not advertise in the standard menu.

The peculiarity of Redmi 8 (codenamed olive) is that it is equipped with a Qualcomm Snapdragon 439 chipset with a modem. X6 LTE, It theoretically supports up to 150 Mbps download speeds, but in practice, users often experience speeds that are 2 to 10 times lower, due to unoptimized default settings, background processes, and even firmware errors. Next, you will learn how to fix this without root rights and complex manipulations.

Before you start settings, make sure that the problem is not on the provider's side.

1. Restart your smartphone and router (if you use Wi-Fi).
2. Check the speed on another device on the same network (for example, on a laptop).
3. Make sure you don’t run out of high-speed traffic (relevant to mobile internet with limits).

If other gadgets have fast Internet, the problem is Redmi 8.

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

By default. MIUI It's often not the fastest modem, for example, a smartphone can cling to a device. 3G instead 4G, Even if you are in the area of coverage LTE. You can fix this manually:

1. Open the Settings. → SIM-maps and mobile networks.
2. Choose yours. SIM-card (if two of them).
3. Go to the Network Type and install it. 4G (recommended or Only LTE (if the first option is not available).
4. Activate the option to Enable VoLTE (voice on) LTE) — This improves the stability of the connection.

If there is no item in the list, only LTE, So your firmware is hiding it. To unlock it, use the code of the engineering menu:

##4636##

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

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If after changing the type of network the Internet disappeared completely, return the settings to the 4G (recommended) and restart the smartphone. Some operators (e.g. Tele2) may block the connection to the LTE, If your smartphone is not certified on your network.

Another hidden parameter is carrier aggregation, which allows you to combine several frequencies. 4G You can check for speed through the NetMonster app (available on the Play Market). If aggregation doesn't work, try it:

• 📶 Change operator – for example, MTS and Beeline more often support aggregation than MegaFon or Tele2.
• 🔄 Update the firmware - in new versions MIUI Profiles may be added for aggregation.
• 📡 Manually select the frequency through the engineering menu (requires caution!).

2. set up Wi-Fi for maximum speed

If the Internet is slowing down through Wi-Fi, the problem may lie in the suboptimal settings of the router or the smartphone itself. 8 Supports Wi-Fi standards 802.11 b/g/n (before 150 Mbps at frequency 2.4 GHz), but only with the right configuration.

First, check the current connection settings:

1. Open the Settings. → Wi-Fi.
2. Click on your network name and see the current connection speed (in Mbps).
3. If the value is below 50 Mbps, then the router or smartphone is using an outdated mode.

Optimal router settings for Redmi 8:

If the router supports 5 GHz, but Redmi 8 does not see this network, this is normal: the model is equipped with only a single-band Wi-Fi module (2.4 GHz).

• 📶 Reduce the router's transmission power to 50-70% (in router settings.
• 🔄 Turn on the option "WMM" (Wi-Fi Multimedia in router settings – it prioritizes traffic.
• 🚫 Turn off Battery Savings for Wi-Fi in Settings → Battery → Saving charge.

3.Cache cleaning and optimization of background processes

Clogged cache and background applications are one of the main reasons for Internet brakes. MIUI It is known for aggressively cacheting data, and some system processes (e.g. miui.analytics) can consume traffic in the background.

How to clean the cache without harming the system:

1. Go to Settings → Applications → Application Management.
2. Sort the applications by cache size (click on the three dots in the upper right corner).
3. Clear the cache for the following apps (they most often slow down the Internet): Browser (Chrome, Mi Browser), Google Play Services Mi Video and Mi Music Facebook, Instagram, TikTok (if installed)

For deep cleaning, use the Safe Mode mode:

• Press the switch off button on the lock screen.
• Hold your finger on the Turn off item until you are prompted to switch to Safe Mode.
• This mode only runs system applications -- check the speed of the Internet, and if it's grown, it's one of the apps that you installed.

Clear the browser cache|Remove unused applications|Disable Auto-Update Applications|Reboot your smartphone-->

It is also worth turning off background activity for unnecessary applications:

1. Go to Settings. → Battery → Saving charge.
2. Select the Apps and disable background work for instant messengers, games and social networks (except those that are critical to you).

4. Modification DNS-servers to speed up loading

The default Redmi 8 uses DNS-Your carrier or provider's servers, which are not always optimal, like MegaFon and Beeline, often redirect traffic through their proxy, which slows down the loading of sites. DNS faster.

How to change DNS Redmi 8:

1. Open the Settings. → Wi-Fi (or Mobile Network if you change for mobile Internet).
2. Click on your network name and select Change Network (for Wi-Fi) or Additional (for mobile Internet).
3. In the field DNS 1 and DNS 2 Enter addresses from the table below.

After shift. DNS:

• Reboot your smartphone.
• Check the speed at the Speedtest website.
• If the speed has not increased, try another one. DNS table-top.

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Shift. DNS It's especially effective if you're slow loading sites like VK or YouTube, but speeds on Speedtest are normal, which means that the problem is with the resolution of domain names, not the connection itself.

5. Disable traffic savings and background synchronization

MIUI It has several hidden features that limit Internet speed in order to save charge or traffic, for example, the option Save traffic can artificially reduce the speed of downloading files, and Background synchronization can consume traffic to update data.

How to disable restrictions:

1. Go to Settings. → SIM-maps and mobile networks → Save traffic and disable this option.
2. Open the Settings. → Accounts and sync and disable automatic sync for unnecessary accounts (Google, Mi Account, etc.).
3. B Settings → Annexes → App Management Select Google Play Services and Limit Background Activity.

Another "trick" MIUI — speed limit for individual applications:

1. Open Settings → Applications → Application Management.
2. Select an app (like YouTube or Chrome).
3. Go to Data Use and make sure there is no back-end traffic limit.

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If you're using a double SIM-map, check if one of them is designated as "Basic for Data" in Settings → SIM-map → Double settings SIM. Sometimes the smartphone mistakenly switches to the second SIM slow-web.

6. Update firmware and reset network settings

If all previous methods failed, the problem could be outdated firmware or broken network settings.Redmi 8 received updates to MIUI 12.5 (based on Android 10), and newer versions often fix modem bugs.

How to update firmware:

1. Go to Settings → About the phone → System update.
2. Click Check Updates and install the latest version.
3. If the update is not found, download the firmware manually from the Xiaomi Firmware site and install through System Update → Three dots → Select a firmware file.

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

1. Open Settings → About the phone → Reset settings.
2. Select Reset Wi-Fi, Mobile Network and Bluetooth settings.
3. Confirm the action and restart the smartphone.

Important: if after all the manipulations the speed is still below 10 Mbps 4G or 30 Mbps on Wi-Fi, the problem may be a hardware malfunction of the modem, in which case only repair or replacement of the smartphone will help.

Alternative methods: shutdown IPv6 change MTU

For advanced users, there are two more ways to speed up the Internet: shutdown IPv6 (quiver IPv4) size-shift MTU (maximum package size).

How to turn off IPv6:

1. Connect to Wi-Fi.
2. Open the Settings. → Wi-Fi → Click on your network. → Change the network.
3. Enable the option of additional parameters.
4. In the Settings field IP select Static.
5. In the field IPv6 select Unplugged.

How to change MTU (requires rooting ADB):

adb shell settings put global captive_portal_mtu 1400

Optimal value MTU Redmi 8 - 1400-1450 If the Internet is lost after the change, return the value to 1500 (default).

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Change of change MTU It can significantly speed up the internet on “loaded” networks (such as offices or public Wi-Fi), where packets are often fragmented.

8.The Hardware Causes of Slow Internet

If the software methods did not help, the problem may be in the hardware:

• 🔋 Weak antenna signal – Redmi 8 has a mediocre antenna for the 4G. Try using a signal repeater or switching operators.
• 🔌 Problems with SIM-Try to move it to another slot or replace it with a new one (especially if the card is older than 3-5 years).
• 🛠️ Modem overheating – if the smartphone heats up while using the Internet, the modem can trott (slow down.

⚠️ Note: if after falling or getting moisture, the Internet began to work worse, the antenna plume probably left or contacts oxidized. SIM-In this case, only disassembly and repair will help.

It’s also worth checking the battery status – if it’s worn out (under 70% capacity), the smartphone may limit performance, including internet speed.

#4636## → Battery

FAQ: Frequent questions about speeding up the Internet on Redmi 8