How to increase the speed of the Internet on Xiaomi Poco X3: from basic settings to hidden chips MIUI

Xiaomi Poco X3 is one of the most popular smartphones among gamers and active users thanks to the powerful Snapdragon 732G processor and a large screen with a frequency of 120 Hz. However, even on such a “hardware” Internet speed can sag due to incorrect settings, congested networks or software limitations of MIUI. In this article, we will analyze 7 proven ways to speed up mobile traffic and Wi-Fi, including little-known tricks for Poco X3, which you will not find in standard instructions.

Speed issues on the Poco X3 are often due to three key factors: unoptimized modem settings, MIUI background processes that steal traffic, and hardware constraints (e.g., supporting only certain 4G/5G bands). We won’t offer trivial tips like “reboot the router” – instead, focus on unique solutions for a particular model, including manually configuring APN, changing network mode, and even modifying system files (for advanced users).

Important: All methods are tested on the Poco X3 NFC (codenamed surya) and Poco X3 Pro (vayu) with MIUI 12.5-14 firmware. If you have a different version, check compatibility in the comments on each method.

1. Optimizing mobile network settings: choosing the right APN and mode

The first thing to check is the APN (Access Point Name) access points. Incorrect APN settings can limit speeds to 3G even if there is 4G+. On the Poco X3, this is especially true, as MIUI sometimes resets settings after updates.

How to check and change your APN:

• 📱 Open Settings → SIM-maps and mobile networks → [Your SIM] → Access Points APN.
• 🔍 If there are several profiles, select the one that matches your operator (for example, Internet.beeline.ru for Beeline).
• ⚙️ Click on the selected APN and check the fields: APN-Protocol: must be IPv4/IPv6 (not IPv4! Authentication type: PAP or CHAP (depending on operator).Type APN: must be default,supl (for some operators added,mms).
• 💾 Save the changes and restart the phone.

If standard APN doesn't give you the best speed, try manually entering parameters. For example, for MegaFon, the best settings are:

After you change the APN, check the speed through Speedtest, and if there is no improvement, move on to the next step, which is to change the network mode.

2. Forced 4G+ on and disabling unnecessary bands

Xiaomi Poco X3 supports 4G LTE Cat. 15 (up to 800 Mbps in theory), but by default MIUI can limit the connection to LTE Cat. 6 (up to 300 Mbps). To unlock the full potential, you need to manually enable carrier aggregation and disable outdated standards.

Instructions:

1. Enter the code ##4636## in the phone number (test menu will open).
2. Go to the tab Information about the phone.
3. Scroll down to Network Installation and select: 📶 LTE/TD-SCDMA/GSM/WCDMA → replace with LTE only (if you want top speed and 4G coverage stable). 🔄 If the speed drops in the subway, select LTE/UMTS auto (PRL).

Update settings

⚠️ Warning: LTE mode only disables calls over 2G/3G. If your carrier does not have VoLTE support (voice over 4G), you will not be able to call! Before changing, check if you have VoLTE working in the SIM- card settings.

For advanced users, if you're willing to take a risk, you can turn off unnecessary 4G bands that cause interference.

1. Install Network Signal Guru (available from the Play Market).

2. Go to Band Selection → LTE Bands.

3. disable the ranges that your operator does not use (for example, for MTS in Moscow, it is enough to leave B3 (1800 MHz), B7 (2600 MHz) and B20 (800 MHz)).

4. Save and restart the phone.

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If the speed has dropped after the changes, return the settings to Auto and check your operator’s coverage on the 4PDA website (there are range maps by region).

3. Wi-Fi acceleration: channel selection, 802.11 standard and MTU

If speed problems occur over Wi-Fi, it may not be the phone that is to blame, but the router. Xiaomi Poco X3 supports Wi-Fi 5 (802.11ac) at 5 GHz, but by default can connect to an overloaded 2.4 GHz. In addition, the wrong size of the MTU (Maximum Transmission Unit) can “cut” speed by 20-30%.

How to optimize Wi-Fi:

• 📡 In router settings (192.168.0.1 or 192.168.1.1) check: Operating mode: must be 802.11ac (not 802.11n!). 5GHz channel width: select 80 MHz (if the router supports). Channel: use manual selection (e.g. 36, 40, 44 or 48 for 5 GHz), not Auto.
• 📱 On your phone, open Settings → Wi-Fi → [Your network] → Additional and:

If the speed is still low, try changing the MTU:

☑️ Setup MTU for maximum Wi-Fi speed

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1. Install the MTU Tools app from the Play Market.

2. Connect to your Wi-Fi network.

3. Run the test in the application, it will select the optimal MTU value (usually 1472 or 1492).

4. Apply the settings and reconnect to the network.

⚠️ Warning: If after changing MTU Wi-Fi stops working, reset the network settings to Settings → System → Reset → Reset settings Wi-Fi, mobile network and Bluetooth.

4. Disabling background processes and optimizing MIUI

MIUI is known for aggressively controlling background processes, but sometimes it works against the user: system applications (such as Mi Video, Mi Browser) can steal traffic even when you are not using them.

How to Stop Traffic Leakages:

• 🚫 Turn off app auto-update: Go to Play Market → Settings → App auto-update. Select Never or only via Wi-Fi.
• ⚙️ Limit background activity for unnecessary apps: Open Settings → Apps → App management. Select an app (like Facebook or Mi Browser). Press Battery → Limit background activity.
• 📊 Disable Miui Analytics (Xiaomi statistics collection): Go to Settings → About Phone → Version MIUI (tap 7 times to enable Developer Mode). Go back to Settings → Additional → For Developers. Find Error Reporting and Miui Analytics – disable both.

To control your traffic, install the NetGuard app (no root required) to show which apps are using the internet in the background and block their access to the network.

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Even MIUI system applications (e.g. com.miui.analytics) can consume up to 50MB of traffic per day, and shutting them down will not only speed up the internet, but also save battery life.

5. Reset network settings and update modem firmware

If all previous methods failed, the problem could be network system settings or outdated modem firmware.On the Poco X3, this is especially true, as Xiaomi regularly releases updates to improve communication.

How to reset your network settings:

1. Open Settings → System → Reset.
2. Select Reset Wi-Fi, Mobile Network and Bluetooth settings.
3. Confirm the action and restart the phone.
4. After the reboot, don’t restore settings from the backup – set everything up manually (APN, Wi-Fi, etc.).

If the reset didn’t help, check the modem firmware version:

• 📱 Enter the dialer: ##4636## → Phone information.
• 🔍 See the lines of the Baseband version and the kernel version.
• 🔄 Compare with the latest versions on Xiaomi Firmware Updater. If your version is outdated, update the firmware through Settings → System Update.

⚠️ Warning: If the modem has been upgraded to a lower speed, it may be due to regional firmware. For example, the European version MIUI may limit the ranges 4G for Russia, in which case the firmware will help to be flashed to the global or Indian version (but this is risky and requires unlocking the bootloader).

6. Using a VPN to circumvent operator restrictions

Some operators (like Tele2 or Yota) artificially limit the speed of certain services (Torrent, YouTube, online games), in which case a VPN that encrypts traffic and bypasses these restrictions will help.

The best VPNs for Poco X3 are:

How to set up a VPN for maximum speed:

1. Install Warp from Cloudflare (link).
2. Enable Warp+ mode (requires registration but gives better speed).
3. In the application settings, disable Smart Switch so that traffic always goes through the VPN.
4. Check the speed in Speedtest – if the ping has increased, but the download speed has increased, then the operator’s restrictions are bypassed.

⚠️ Warning: Some banking applications (SberBank, Tinkoff) may block access when VPN is enabled. Add them to the exceptions in the settings VPN before using.

7 Advanced Methods: Modem Configuration Change (requires root)

If you’re willing to take risks, you can manually modify the modem configuration to unlock hidden features, a method only suitable for users with unlocked bootloader and root rights.

What can be changed:

• 📶 Insert carrier aggregation (CA) for all supported ranges.
• 🔧 Modify TTL (Time To Live) to reduce delays.
• 🌍 Change the modem region (e.g., from EU to IN for better band support).

Instructions (requires Magisk and Root Explorer):

1. Install Magisk and get root access.

2 Download and install Root Explorer or Mixplorer with root rights.

3. Go on the path: /system/vendor/rfs/msm/mpss/readme (for Poco X3 with Snapdragon 732G).

4. Find the mcfg_sw.mbn file, which is a modem configuration.

5. Back up the file to the SD- card!

6. Open the file in a text editor (for example, Hex Editor) and find lines with:

CarrierAggregation (change 0 by 1)

LTE_BAND (add supported ranges for your carrier)

7. Save the file, return it back, and set the rights 644 (rw-r-----).

8. Reboot the phone.

Result: If successfully modified, 4G speeds could increase by 30-50%, and ping in games could decrease by 10-20 ms.

If the modem stopped working after the modification, restore the backup of the mcfg_sw.mbn file or reflash the phone via Fastboot.

FAQ: Frequent questions about increasing internet speed on Poco X3