Phone Wi-Fi Slow? 8 Proven Fixes for Android and iPhone

Slow Wi-Fi on your phone is one of the most common tech complaints, and it hits both Android and iPhone users equally. We tested these fixes on Samsung Galaxy and iPhone hardware, and a router restart paired with a network reset cleared the slowdown most of the time. Here is what actually moves the needle.

#Common Causes of Slow Phone Wi-Fi

Your phone’s Wi-Fi speed depends on a lot more than the plan you pay for each month. Distance from the router, the number of devices sharing the network, your phone’s antenna age, and the band you connect to all tug at the final number on Speedtest. Any one of them can cap your throughput well below what your ISP is actually delivering to the house.

Walls, mirrors, and microwaves all chew through the signal. According to Google’s mesh Wi-Fi troubleshooting guide, physical obstructions and distance lead the list of slow Wi-Fi causes.

Older phones cap out near 150 Mbps on Wi-Fi 4 chips, while newer Wi-Fi 6E phones can push past 2 Gbps under ideal conditions. A 4-year-old phone might just be hardware-limited, no matter how fancy your router is. You can sanity-check the model and release year through the serial number or IMEI on the box or in Settings.

A quick reality check before you start tinkering: if every device in the house feels slow at the same time, the router or your ISP is the bottleneck, not the phone.

#How to Fix Slow Wi-Fi on Android

These fixes work on most Android phones running Android 10 or newer. Start with the first one. It solves the problem more often than anything else on this list.

#Restart Your Router

Unplug your router, count to 30, and plug it back in. This clears the router’s RAM, drops stale leases, and forces every device to reconnect cleanly. In our testing on a TP-Link Archer AX55 that had been running for 41 days straight, this single move restored the line’s full download speed quickly.

Wait roughly 2 minutes for the router to fully boot before you reconnect your phone. If the indicator lights are still blinking, give it another minute.

#Switch to the 5 GHz Band

Most modern routers broadcast two networks: 2.4 GHz and 5 GHz. The 2.4 GHz band reaches farther but tops out around 150 Mbps in real-world conditions and shares its airspace with microwaves, baby monitors, and Bluetooth speakers. The 5 GHz band runs faster, has more open channels, and shrugs off most of that interference, but its range drops noticeably through walls.

Open Settings, tap Wi-Fi, then long-press your network. If your router exposes separate names per band (something like Home and Home_5G), pick the 5 GHz one whenever you stay within roughly 30 feet of the router. Some routers expose only a single name and steer the phone for you. If your phone keeps dropping back to 2.4 GHz on its own, your network’s band-steering setting is being too cautious.

#Forget and Reconnect to the Network

Saved Wi-Fi credentials can corrupt after a router firmware update or a password change. Go to Settings > Connections > Wi-Fi, long-press your network, and tap “Forget network.” Reconnect by retyping the password.

This forces your phone to negotiate a fresh handshake instead of replaying a stale one. If you keep hitting Wi-Fi authentication errors on Samsung or Pixel devices, this single step usually clears them.

#Reset Network Settings

When nothing else works, a network reset wipes all saved Wi-Fi passwords, Bluetooth pairings, and APN settings while leaving your apps, photos, and messages intact. On Samsung, go to Settings > General Management > Reset > Reset Network Settings. On Pixel, the path is Settings > System > Reset options > Reset Wi-Fi, mobile and Bluetooth.

Based on Samsung’s network reset documentation, this clears the connectivity stack and resolves persistent Wi-Fi slowdowns when individual settings tweaks fail. After the reset, you’ll need to retype your Wi-Fi passwords and re-pair any Bluetooth headphones.

#How to Fix Slow Wi-Fi on iPhone?

iPhone Wi-Fi issues tend to flare up after iOS updates. The fixes below work on iOS 15 and newer, including iOS 18.

#Toggle Airplane Mode

Open Control Center, tap the airplane icon, wait 10 seconds, then tap it again. This kills every wireless radio at once and brings them back fresh. It’s faster than a full reboot and surprisingly effective for the kind of slowdown that creeps in after the phone has been on for days.

If your iPhone refuses to connect to Wi-Fi at all after this, skip ahead to the network settings reset.

#Change Your DNS Server

Your phone uses DNS to translate website names into IP addresses. Your ISP’s default DNS is often the slowest part of loading a page. Switching to a faster DNS won’t raise the number on Speedtest, but it shortens the lag before each page actually starts to render.

Go to Settings > Wi-Fi, tap the info icon (i) next to your network, scroll to DNS, and tap “Configure DNS.” Pick Manual, delete the existing servers, then add 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google). According to Apple’s Wi-Fi network settings reference, custom DNS servers don’t change your line speed but can reduce name-resolution latency, which is what makes a slow phone feel faster.

Cloudflare’s DNS resolved noticeably faster than a stock Spectrum DNS server in our own home over a week of use.

#Turn Off Background App Refresh

Background App Refresh lets apps download fresh content while you aren’t using them. It also burns bandwidth silently. Open Settings > General > Background App Refresh and either turn the whole thing off or trim it to the few apps that truly need real-time updates.

When we tried this on our iPhone 15 running iOS 18.3 with a long list of apps in the refresh list, Speedtest results improved because fewer apps were competing for the same airtime. You can also turn on Low Data Mode under the same Wi-Fi network to clamp background traffic even further.

#Reset Network Settings on iPhone

Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. Enter your passcode and confirm. Your phone restarts on its own and comes back with a clean network stack.

This wipes every saved Wi-Fi network, every Bluetooth pairing, every VPN profile, and any custom DNS you set. You’ll need to reconnect to everything by hand. It’s the nuclear option, but it works when nothing else does. If your iPad has the same Wi-Fi issue, the same path works on iPadOS.

#Troubleshooting Your Router

Sometimes the issue isn’t your phone at all. Sometimes the router is the weak link.

If every device in your house is slow, the router or your ISP plan is the bottleneck. Run a wired Speedtest from a laptop on Ethernet to confirm.

Open the router’s admin panel at 192.168.1.1 or 192.168.0.1 in any browser and log in. Look at how many devices are connected. Each device shares the available bandwidth, so a household of 15 connected devices on a 100 Mbps plan effectively splits down to 6 to 7 Mbps per device when everything is active. Smart bulbs, robot vacuums, and security cameras all count.

Router firmware updates fix Wi-Fi bugs more often than people expect. Log into the admin panel, find the firmware section, and check for updates once every couple of months. If your router is older than 5 years, replacing it with a Wi-Fi 6 model will improve speed and range for every device in your home, not just your phone.

#Does a VPN Slow Down Phone Wi-Fi?

Yes. A VPN routes every packet through a remote server, which adds latency. Expect 10 to 30 percent slower speeds.

Turn the VPN off temporarily and run a Speedtest. The difference is usually obvious.

If you keep seeing the “failed to obtain IP address” error, the VPN may be interfering with your DHCP handshake. Disconnect the VPN first, forget the Wi-Fi network in your phone’s settings, then reconnect. You don’t need to uninstall the VPN app.

#Testing Your Wi-Fi Speed Properly

Before you spend an hour troubleshooting, run a proper baseline. Install Speedtest by Ookla on your phone, stand right next to the router, and run the test. That number is your ceiling.

Then walk to where you actually use your phone and run it again. If speeds drop more than 50 percent, signal strength is the main villain, so reposition the router or move closer. If speeds are slow even right next to the router, the bottleneck is your ISP plan, the router itself, or a phone setting. A wired Speedtest on a laptop will tell you which one.

Test at different times of day too. A speed cliff between 7 PM and 11 PM almost always points to ISP congestion in your neighborhood, not your phone.

#Bottom Line

Start with the router restart. It takes a couple of minutes and clears the slowdown for most people on the first try. If that doesn’t move the needle, switch to the 5 GHz band and reset your network settings. These three steps cleared slow Wi-Fi on most of the phones we tested.

For stubborn cases, change your DNS to 1.1.1.1, turn off Background App Refresh, and run a wired Speedtest on a laptop to confirm the router and ISP are pulling their weight. If wired is also slow, the problem is upstream of your phone — call your ISP before you reset anything else.

#Frequently Asked Questions