My laptop's Wi-Fi connection is slow, but my phone is flying: Why is this happening and how to fix it?

Have you noticed that on your smartphone, pages load instantly, videos in 4K It doesn't slow down, and it's the same on my laptop. YouTube constantly buffering even though both devices are connected to the same network Wi-FiThis situation is familiar to many, and it's not always due to a weak laptop or poor internet connection. The speed difference can be as high as 2–5 times, and the reasons lie in both hardware features and software settings.

In this article we will look at 7 Key Reasons Why Your Laptop Slows Down Your Wi-Fi Speed ​​Compared to Your SmartphoneWe'll also provide step-by-step instructions for diagnosing and fixing the problem. You'll learn how to check your actual connection speed (not the one your ISP reports), which router settings affect signal stability, and why even a new laptop can be slower than an old one. iPhone.

Spoiler: in 80% of cases, the problem can be resolved without purchasing new hardware—simply update the drivers, change the Wi-Fi channel, or disable the network card's power-saving mode. Let's start with the simplest thing—checking your current speed.

1. How to measure Wi-Fi speed on a laptop and phone

Before you look for the reasons for slow internet, make sure that you you measure speed correctlyTesting errors can show false differences between devices. Here's how to do it correctly:

• 📱 On the phone: use applications Speedtest by Ookla or nPerfDisable your mobile data (use Airplane Mode with Wi-Fi enabled) and test in the same location where your laptop is located. Repeat the measurement 2-3 times and take the average reading.
• 💻 On the laptop: Close all programs except the browser. Go to speedtest.net or fast.com (from Netflix). Important: Test the speed in the same browser you usually use - Chrome, Firefox or Edge may show different results!
• 🔄 Compare: if the difference exceeds 30–40%, it's time to look for the cause. If the difference is minimal (up to 10–15%), the problem may be with the website itself or the application you are using.

A critical point: many laptops automatically limit Wi-Fi speeds power saving modeBefore testing, connect your laptop to a power outlet or set the power settings to "Maximum Performance."

⚠️ Attention: If your laptop's Ethernet speed matches the provider's advertised speed, but Wi-Fi is significantly slower, the problem is definitely with the wireless connection. If the cable is also slow, the problem lies with your ISP or router.

2. Hardware limitations: why a smartphone often outperforms a laptop

Modern smartphones are often equipped with more advanced Wi-Fi modules, than budget or even mid-range laptops. Here are the key hardware reasons for the speed difference:

For example, if your router operates at a frequency 5 GHz at speed 867 Mbps, and the laptop only supports 2.4 GHz on 150 Mbps, the difference will be colossal. You can check the supported Wi-Fi standards on your laptop like this:

1. Click Win + R, enter msinfo32 and press Enter.
2. In the window that opens, go to Components → Network → Adapter.
3. Find the line with the name of your Wi-Fi adapter (for example, Intel Wi-Fi 6 AX200) and see the supported standards.

If your adapter is outdated, you can replace it with a more modern one (for example, Intel AX210 or Qualcomm FastConnect 6900), but this requires disassembling the laptop and is not always possible on ultrabooks.

3. Router settings: which parameters are cutting speed on a laptop

The router can be configured so that prioritizes smartphone traffic or uses settings that aren't optimal for laptops. Here are the key settings to check:

• 📡 Wi-Fi operating mode: if the router is configured to 802.11n (Wi-Fi 4), the laptop will not be able to use higher speed standards. Switch to 802.11ac (Wi-Fi 5) or 802.11ax (Wi-Fi 6).
• 🔄 Channel width: on frequency 5 GHz set the channel width 80 MHz (if the router supports it). 2.4 GHz width 40 MHz may cause interference.
• 🔒 Security type: outdated WEP or WPA slows down the connection. Use WPA2-PSK or WPA3.
• 📶 Transmission power: Find the parameter in the router settings Transmit Power and install on 100% (sometimes it's worth it 50% by default).

How to change these settings:

1. Open your browser and enter the router's IP address (usually 192.168.0.1 or 192.168.1.1).
2. Log in (default logins/passwords are indicated on the router sticker).
3. Go to the section Wireless (or "Wireless Network") and change the settings as described above.
4. Save the settings and reboot the router.

⚠️ Attention: If after changing the channel width on 80 MHz the connection has become unstable, please return 40 MHz — Perhaps there is too much interference from neighboring networks in your home.

4. Windows Drivers and Settings: Hidden Slowdowns

One of the most common reasons for slow Wi-Fi on a laptop is outdated or incorrectly configured drivers network card. Windows often installs "generic" drivers that don't utilize the adapter's full potential.

How to update the driver manually:

1. Click Win + X and select device Manager.
2. Expand the tab Network adapters, find your Wi-Fi module (for example, Qualcomm Atheros QCA61x4A).
3. Right click → Update driver → Search for drivers on this computer.
4. Select Select a driver from the list of available ones and install the latest version (if it is on the list).

If Windows doesn't find updates, download the driver from the laptop or adapter manufacturer's website:

• For Intel: intel.ru (Support section).
• For Qualcomm/Atheros: qualcomm.com.
• For Realtek: realtek.com.

After updating the driver Disable power saving for your Wi-Fi adapter:

1. IN Device Manager Right-click on the adapter → Properties.
2. Go to the tab Power management.
3. Uncheck the box Allow the computer to turn off this device to save power.

What should I do if Wi-Fi disappears after updating the driver?

If the adapter stops working after updating the driver, roll back to the previous version: in Device Manager, right-click the adapter → Properties → Driver → Roll Back Driver. If the button is grayed out, uninstall the device (right-click → Uninstall) and restart your laptop. Windows will reinstall the driver.

5. Interference and router placement: physical causes of lag

Even if the laptop and phone are next to each other, physical obstacles can affect them differently. Smartphones often have more sensitive antennas, while laptops have a worse signal reception due to their metal casing or the location of the adapter.

Please check the following points:

• 📍 Distance to router: If your laptop is in another room or behind a thick wall, the signal will weaken. Move closer to the router and repeat the speed test.
• 🛑 Interference: Microwaves, wireless headphones, and neighboring Wi-Fi networks on the same channel can degrade the connection. Use an app Wi-Fi Analyzer (Android) or NetSpot (Windows/macOS) to find a free channel.
• 🔄 Router antenna orientation: If the antennas are pointed vertically, the signal propagates horizontally (and vice versa). Try changing their orientation.
• 📶 Dual-band Wi-Fi: if the router supports 5 GHz, connect your laptop to this network - it is less loaded and faster (although it has a shorter range).

You can check the current channel load like this:

1. Download Wi-Fi Analyzer on the phone or NetSpot on a laptop.
2. Run a scan - the program will show which channels are occupied by neighboring networks.
3. In the router settings, select the least loaded channel (for example, 36, 40, 44 or 48 For 5 GHz).

⚠️ Attention: On frequency 2.4 GHz channels 1, 6 And 11 do not intersect - it is recommended to use them in apartment buildings. 5 GHz There is usually less interference, but walls weaken the signal more.

6. Background processes and viruses: who is stealing your internet

A laptop, unlike a smartphone, often runs dozens of background processes: Windows updates, cloud synchronizations (OneDrive, Google Drive), torrents or even viruses can absorb the lion's share of traffic.

How to check and stop speed thieves:

• 🖥️ Task Manager: click Ctrl + Shift + Esc, sort the processes by network (the "Network" column) and see what's consuming your traffic. Common culprits: Svchost.exe (Windows updates), OneDrive, uTorrent.
• 🛡️ Antivirus: scan your system for viruses (for example, Malwarebytes or built-in Windows Defender). Some malware uses your Wi-Fi for mining or DDoS attacks.
• ⚙️ Update settings: Turn off automatic app updates in Microsoft Store or SteamIn Windows 10/11, limit background bandwidth:

  Settings → Update & Security → Advanced Options → Delivery Optimization → Limit bandwidth used

If the problem is with torrents or cloud services, limit their speed in the settings. For example, in uTorrent set download/upload limit on 50–70% from the maximum speed of your tariff.

7. Protocol and QoS Features: Why a Router “Loves” a Phone More

Many modern routers support the technology QoS (Quality of Service), which automatically prioritizes traffic between devices. By default, some models prioritize mobile devices (especially if they are connected to the same account as the router, like Xiaomi or TP-Link).

How to check and disable QoS:

1. Go to your router settings (192.168.0.1 or 192.168.1.1).
2. Find the section QoS, Bandwidth Control or "Traffic Priority".
3. Disable QoS or manually assign the laptop the highest priority (by MAC address).
4. Save the settings and reboot the router.

Another possible reason is - different connection protocols. For example:

• The phone can use 802.11ac on 5 GHz with channel width 80 MHz.
• Laptop - 802.11n on 2.4 GHz with width 20 MHz.

You can check the current connection protocol on your laptop using the command line:

netsh wlan show interfaces

Search for lines Radio type (must be 802.11ac or 802.11ax) And Channel (preferably 36–165 For 5 GHz).

⚠️ Attention: QoS settings may be reset after updating your router firmware. If your speed has dropped again, check this setting.

FAQ: Frequently asked questions about slow Wi-Fi on a laptop

❓ Why is the Wi-Fi speed on my laptop 50 Mbps, but on my phone it's 300 Mbps?

Most likely, the laptop is connected to the network. 2.4 GHz, and the phone is to 5 GHz. Also check the Wi-Fi standard: if the laptop only supports 802.11n (Max. 150–300 Mbps), and the phone is 802.11ac (867 Mbps and above), the difference will be significant. Solution: connect the laptop to 5 GHz or update your Wi-Fi adapter.

❓ Can antivirus software slow down Wi-Fi?

Yes, some antiviruses (for example, Kaspersky, Avast) scan network traffic in real time, which can reduce speed on 10–30%Try temporarily disabling network protection in your antivirus settings or adding your browser to the exceptions list.

❓ Why does the speed drop when the laptop is running on battery?

By default, Windows limits Wi-Fi adapter performance in power saving mode. To fix this:

1. Open Control Panel → Power Options → Change plan settings → Change advanced settings.
2. Find Wireless Network Adapter Settings → Power Saving Mode.
3. Install Maximum performance for both modes (battery and mains).

❓ Will replacing the router help?

Replacing your router makes sense if the current one:

• Does not support Wi-Fi 5 (802.11ac) or Wi-Fi 6 (802.11ax).
• Works only on frequency 2.4 GHz.
• It has a weak processor and cannot handle the load (for example, cheap models from the provider).

Recommended models for home: TP-Link Archer AX6000, ASUS RT-AX88U, Xiaomi AX6000.

❓ Why does my speed temporarily increase after rebooting my router?

Restarting your router clears the cache, resets connected devices, and frees up occupied channels. If your speed increases after a restart but then drops again, the problem may be:

• The router is overheating (place it in a ventilated area).
• Channel load (change the channel in the settings).
• Too many devices connected (limit to 10–15).