Xiaomi Poco X3 Pro is a powerful smartphone with a Snapdragon 860 processor and support for modern communication standards, but even it can slow down when working with the Internet. Slow loading pages, connection breaks or slow speed in online games are typical problems that are solved without using the service. In this article, we will discuss 12 working methods for optimizing mobile and Wi-Fi Internet, including hidden MIUI settings, selecting the best frequencies and diagnosing hardware limitations.
The Poco X3 Pro features support for 5G (modified with the Snapdragon 860 5G) and dual-band Wi-Fi 5 (2.4/5 GHz). However, by default, the smartphone often uses suboptimal settings, which makes the real speed lower than possible. We tested all methods on MIUI 12.5-14 firmware and identified those that give maximum growth - from 10% to 300% depending on the initial conditions.
1. Checking the current Internet speed: basic tests
Before you optimize, you need to understand where the bottleneck is. On the Poco X3 Pro, the speed depends on:
- 📶 Type of connection (mobile internet or Wi-Fi).
- 📊 Network loads of the operator or router.
- 📱 Background activity of applications (synchronization, auto-updates).
- 🔧 Settings MIUI (Power saving mode, restrictions for applications).
Use Speedtest by Ookla or nPerf to test.
⚠️ Warning: Turn off before the test VPN, Close all applications in the background and put the smartphone in the “Performance” mode (Settings) → Battery → Test near the router (for Wi-Fi) or in open areas (for mobile Internet).
Normal performance for the Poco X3 Pro:
| Type of connection | Minimum speed (Mbps) | Optimal speed (Mbps) |
|---|---|---|
| 4G (LTE) | 10–20 | 50–150 |
| 5G | 50–100 | 200–500 |
| Wi-Fi 2.4 GHz | 5–10 | 30–70 |
| Wi-Fi 5 GHz | 20–50 | 100–300 |
If your results are below the minimum, the problem is either the settings of the smartphone or external factors (overloaded tower, weak signal router).
2. Mobile Internet Optimization: Network and APN Choice
By default, MIUI automatically selects the type of network, but this algorithm is not always optimal. For example, a smartphone can stick to a congested 3G tower instead of switching to 4G.
How to Manually Select Network Priority:
- Open the Settings. → SIM-maps and mobile networks.
- Choose yours. SIM-map → Type of network.
- Install 4G only (preferably) or 5G/4G/3G/2G (auto) (if you have a Poco X3 Pro 5G).
If the speed is still low, check the APN settings. Incorrect APN settings are a common cause of slow Internet.
Download current APN settings from the operator (on the site or via SMS)| Go to Settings → Mobile Network → Access Points (APN)| Delete old APN|Add a new profile with operator parameters |Save and restart your smartphone-->
Critical error: If there are multiple profiles on the APN list with the same name, the smartphone may use an outdated one.
3. Wi-Fi acceleration: frequency and channel selection
The Poco X3 Pro supports Wi-Fi 5 (802.11ac), but by default connects to a 2.4 GHz network that is overloaded and jammed. Switching to 5 GHz can increase speeds by 3-5 times.
How to forcefully connect to 5 GHz:
- 🔄 Reboot the router and smartphone.
- 📡 In the router settings (192.168.0.1 or 192.168.1.1) divide up 2.4 GHz and 5 GHz (give them different names, for example) MyWiFi_2G and MyWiFi_5G).
- 📱 On your smartphone, select a network 5G manually.
If 5GHz does not catch or breaks off frequently, check:
⚠️ Attention: The 5GHz range has a smaller coverage area than 2.4GHz. If you're far from the router, the signal may disappear.Solution: set the router closer or use the Mesh system (e.g. Xiaomi Mi Wi-Fi Mesh).
Also optimize your Wi-Fi channel in your router settings:
| Range. | Best channels (little interference) | Worst channels (overloaded) |
|---|---|---|
| 2.4 GHz | 1, 6, 11 | 3, 7, 9 |
| 5 GHz | 36, 40, 44, 48, 149, 153, 157, 161 | Auto-select (often selecting overloaded) |
💡
If you have a dual-band router, turn on Band Steering (in router settings) and it automatically switches devices between 2.4 GHz and 5 GHz for optimal speed.
4 Hidden MIUI settings to speed up the internet
MIUI hides a few useful features that can significantly improve speed, one of which is the developer mode, where fine network settings are available.
How to turn on the developer mode:
- Go to Settings. → The phone.
- Tap 7 times on the MIUI version.
- Back to Settings → Additionally. → For developers.
Now activate these options:
- 🚀 Disable the absolute signal level (helps with unstable signal).
- 📶 Turn on 4G+ (If your operator supports frequency aggregation).
- 🔄 Limit background processes → Maximum 2 process (frees up resources for the Internet).
- 🛡️ Disable GPay verification (if you don’t use Google Pay, it speeds up your network connection).
Another hidden feature is resetting the network settings, which helps if the speed drops after a MIUI update or a change of operator.
→ SIM-maps and mobile networks → Network resetOnce reset, the smartphone will reboot and all network settings will return to factory settings. Don't forget to reset APN!
💡
Developer mode allows you to manually select a network type (e.g., force LTE-only enabled), which is useful in areas with unstable 4G.
5. Optimization of background processes and energy saving
MIUI aggressively restricts the background activity of applications to save battery power, which often leads to connection breaks (for example, in instant messengers or online games).
How to disable restrictions:
- Go to Settings → Battery → Battery Mode.
- Select Performance (disables most restrictions).
- For critical applications (e.g. Telegram, Discord, games) install No Limits in the battery settings of each application.
Also check autosynchronization:
- 🔄 Open the Settings. → Accounts and synchronization.
- 📱 Turn off sync for unnecessary accounts (e.g. Mi Account if you don’t use Xiaomi services).
- 📅 Set up manual sync for your Google Account (or disable it altogether).
If the problem is loading lags (for example, YouTube videos are slowing down), try:
Why does video lag even at high speed?
Hardware restrictions: antennas and cooling
If all the software methods didn't help, the problem could be the hardware.Poco X3 Pro has two antennas for 4G/5G, but their operation depends on:
- 📡 Positions of the smartphone (antennae are located in the upper and lower parts of the body).
- 🌡️ Temperatures (when overheating, the speed artificially decreases).
- 🛡️ Cover (metal or thick covers can shield the signal).
How to improve reception:
- 📱 Hold the smartphone vertically (antennas are better at catching the signal in this position).
- 🔥 Avoid overheating: Do not use the internet when charging or in hot conditions.
- 🚫 Remove the case and check if the signal has improved (especially if the case with metal elements).
If the signal is stable weak (1-2 divisions), the antenna may be damaged.
##4636##In Network Information, see Network Signal. If the ASU is below 10 (or dBm is worse than -100), the antenna is not working properly, and only repairs will help.
7. Alternative methods: VPN, DNS and firmware
If standard methods have failed, try non-trivial solutions.
1. DNS change
DNS-The servers of the operator or provider can slow down the loading of sites. DNS:
- 🌍 Google DNS: 8.8.8.8 and 8.8.4.4
- 🌍 Cloudflare DNS: 1.1.1.1. and 1.0.0.1.
- 🌍 AdGuard DNS (blocking advertising: 94.140.14.14 and 94.140.15.15
How to change DNS to Poco X3 Pro:
Settings → Connections and Sharing → Private DNS → Enter the host name (e.g. dns.google)2.Use of VPN
In some cases, a VPN can increase speed if the operator artificially slows down traffic (for example, for video or torrenting).
- 🛡️ ProtonVPN (free rate with speed limit).
- 🚀 Warp+ Cloudflare (optimized for mobile devices).
3. Update or roll back firmware
If the problems started after the MIUI update, go back to the previous version.
- Download the necessary firmware from the Xiaomi Firmware website.
- Go to Settings → About Phone → System Update → Three Dots → Select a firmware file.
- Install the downloaded file.
⚠️ Warning: Firmware rollback will reset all data! pre-backup to Settings → Additionally. → Backup and reset.