LG G5 Slow WiFi Fix: Step-by-Step Guide

If your LG G5 is showing a strong WiFi signal but pages load slowly, videos buffer endlessly, or connections drop intermittently, you are not alone. This guide walks through the most effective fixes, from simple software toggles to deeper system settings, so you can restore fast, stable WiFi on your G5. Before starting, make sure your phone has at least 30% battery and you know your WiFi network name and password, as some steps require reconnecting.

What You’ll Need

• Your LG G5 (any variant: H820, H830, H840, H850, H860, RS988)
• Your WiFi network name (SSID) and password
• A stable internet connection on another device (phone, tablet, or computer) to test if the problem is phone-specific
• Optional: a paperclip or SIM ejector tool if you need to remove the SIM tray (not usually required for WiFi fixes)

Step-by-Step

1. Restart your LG G5 and your router. Press and hold the power button, tap “Restart,” and wait for the phone to reboot. Simultaneously, unplug your router and modem for 30 seconds, then plug them back in. Wait for the router lights to stabilize (usually 1–2 minutes) before testing WiFi again. This clears temporary glitches on both ends.
2. Turn WiFi off and on. Swipe down from the top of the screen with two fingers to open Quick Settings. Tap the WiFi icon to turn it off, wait 10 seconds, then tap it again to turn it back on. This forces the G5 to re-scan and reconnect to the strongest available network.
3. Forget and reconnect to your WiFi network. Go to Settings > WiFi. Long-press your current network name, tap “Forget network,” then tap your network again, enter the password, and connect. This clears any corrupted saved credentials or cached connection data.
4. Toggle Airplane Mode. Open Quick Settings and tap the Airplane Mode icon to enable it. Wait 15 seconds, then tap it again to disable. This resets all radio antennas (WiFi, Bluetooth, cellular) without a full reboot and often clears stubborn WiFi stalls.
5. Check for system updates. Go to Settings > About phone > Update Center > System update. Tap “Check for updates” and install any available updates. LG released several software patches for the G5 that improved WiFi stability and performance; being current ensures you have those fixes.
6. Reset network settings. Go to Settings > General > Backup & reset > Network settings reset. Confirm the action. This clears all saved WiFi networks, Bluetooth pairings, and mobile data settings. You will need to re-enter your WiFi password afterward. This does not erase your photos, apps, or personal files.
7. Change WiFi frequency band (if available). Go to Settings > WiFi > Advanced WiFi (tap the three-dot menu in the top-right corner). Look for “WiFi frequency band” and switch it from “Automatic” to “2.4 GHz only” or “5 GHz only.” If your router supports 5 GHz, that band is usually less congested and faster. If 5 GHz is weak in your location, switch to 2.4 GHz for better range. Test both to see which performs better in your situation.
8. Disable WiFi power saving. In the same Advanced WiFi menu, look for “WiFi power save mode” or “Optimize WiFi usage.” Turn it off if present. This stops the phone from aggressively throttling WiFi to save battery, which can cause slow speeds.
9. Clear the WiFi cache (via safe mode). Turn off the phone. Press and hold the power button, then when the LG logo appears, release and immediately press and hold the Volume Down button until the home screen appears with “Safe mode” in the bottom-left corner. In safe mode, third-party apps are disabled. Test WiFi speed. If it is fast in safe mode, a third-party app (like a VPN, battery saver, or network optimizer) is causing the slowdown. Restart the phone to exit safe mode, then uninstall recently installed apps one by one until the issue stops. If WiFi is still slow in safe mode, the problem is system-level; proceed to the next step.
10. Factory reset (last resort). Back up your data first (photos, contacts, messages) to Google Drive or a computer. Go to Settings > General > Backup & reset > Factory data reset. Tap “Reset phone,” then “Erase everything.” The phone will reboot and take 5–10 minutes to set up. Reconnect to WiFi after setup. This restores all WiFi-related system files to their original state and resolves persistent software conflicts.

Common Mistakes

• Skipping the router restart. Many users only restart the phone, but the router may be the bottleneck. Always restart both simultaneously.
• Not testing on another device. If your laptop or tablet is also slow on the same network, the problem is your internet connection, not the G5. Test before doing any phone resets.
• Using the wrong frequency band. Forcing 5 GHz when you are far from the router will cause slower speeds and frequent drops. 2.4 GHz has better range; 5 GHz is faster but shorter range. Choose based on your distance from the router.
• Ignoring safe mode results. If safe mode fixes the issue, uninstalling apps is the correct fix, not a factory reset. Many users wipe their phone unnecessarily when the culprit was a single app.
• Forgetting to re-enter the password after network reset. After a network settings reset, all saved networks are gone. You must reconnect manually.

Tips

• Position your router centrally. Place it in an open area, away from walls, metal objects, and microwaves, which can interfere with WiFi signals.
• Update your router firmware. Log into your router’s admin page (usually at 192.168.1.1 or 192.168.0.1) and check for firmware updates. Outdated router firmware can cause slow speeds for all devices.
• Use a WiFi analyzer app. Download a free WiFi analyzer from the Play Store to see which channels are congested in your area. Switch your router to a less crowded channel (1, 6, or 11 for 2.4 GHz) through its settings.
• Disable Bluetooth when not in use. Bluetooth and 2.4 GHz WiFi share the same frequency range and can interfere with each other. Turning off Bluetooth can improve WiFi speed.
• Keep your G5 updated. Regularly check for software updates under Settings > About phone. LG’s updates often include performance improvements.

Troubleshooting

If you have followed all steps and WiFi is still slow, try these additional checks:

• Test with a different router or hotspot. Connect your G5 to a mobile hotspot from another phone. If it is fast there, your home router is the problem; consider replacing it or contacting your ISP.
• Check for physical antenna damage. The G5’s WiFi antenna is located in the bottom chin piece. If you have dropped the phone or the chin is loose, the antenna may be damaged. Try removing and re-seating the chin (pull it off and snap it back on). If that does not help, the antenna hardware may need professional repair.
• Try a static IP address. In WiFi settings, long-press your network, tap “Modify network,” check “Show advanced options,” set IP settings to “Static,” and enter an IP like 192.168.1.50 (matching your router’s subnet), gateway as your router’s IP, and DNS as 8.8.8.8 and 8.8.4.4. This can bypass DHCP issues that cause slow connections.
• Check if the issue is app-specific. If only certain apps (like YouTube or a game) are slow, clear that app’s cache: Settings > Apps > [App] > Storage > Clear Cache. If that fails, uninstall and reinstall the app.
• Contact LG support. If the phone is under warranty and all software fixes have failed, there may be a hardware fault. Contact LG support or visit an authorized service center.

Frequently Asked Questions

Why is my LG G5 WiFi slow but other devices are fast?
This indicates the problem is specific to your phone. The most common causes are outdated system software, a corrupted network cache, or a third-party app interfering with WiFi. Following the steps above, especially the network settings reset and safe mode test, usually resolves it.

Will a factory reset definitely fix my slow WiFi?
No, but it resolves the issue in most cases where the cause is software-related. If the problem persists after a factory reset, the cause is likely hardware (damaged antenna or WiFi chip), and professional repair is needed.

Does the LG G5 support 5 GHz WiFi?
Yes, the LG G5 supports both 2.4 GHz and 5 GHz bands. You can switch between them in Settings > WiFi > Advanced WiFi > WiFi frequency band. Note that 5 GHz has shorter range but faster speeds in optimal conditions.

Why does my WiFi speed drop when I move to another room?
Walls, furniture, and distance weaken the WiFi signal. The G5’s antenna is in the removable chin, so holding the phone by the bottom can also block the signal. Try using the 2.4 GHz band for better range, or move closer to the router.

Can a VPN app slow down my G5’s WiFi?
Yes. VPNs encrypt all traffic, which adds overhead and can significantly reduce speeds, especially on slower connections. If you use a VPN, try disabling it temporarily to see if speeds improve. If you need the VPN, try a different server location or protocol.

Is there a known hardware issue with LG G5 WiFi?
Some users have reported WiFi antenna issues related to the removable chin piece. If the chin is loose or damaged, it can degrade signal quality. Re-seating the chin or replacing it may help. If the problem persists, the WiFi module on the motherboard may be faulty.

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