How to Fix Slow WiFi on Google Pixel After an Android Update: Radio Firmware, Adaptive Connectivity, and Network Reset Fixes

Google Pixel phones receive monthly Android security patches and periodic major OS upgrades — and a frustrating but well-documented side effect is that WiFi can become noticeably slower for hours or even days afterward. Community threads following the October 2025, December 2025, and January 2026 Pixel updates all contained hundreds of users reporting the same pattern: phone connects fine, shows full bars, but speeds are a fraction of normal. This guide explains every known cause and fix, starting with the quickest to try.

Why Does a Pixel Update Slow Down WiFi?

Several distinct mechanisms can cause post-update WiFi slowdowns on Pixel devices:

• Background optimization: Immediately after an update, Android re-compiles app bytecode (dex2oat) and re-indexes storage. This heavy CPU load competes with the WiFi radio’s interrupt handling, causing temporary throughput drops that resolve on their own within 30–90 minutes.
• Radio firmware update: Major Android updates often include a new baseband/radio firmware image. If that flash is interrupted or the new firmware has bugs, WiFi (and sometimes cellular) can be degraded until the issue is patched.
• Settings regression: Updates occasionally reset or alter network-related settings — including Private DNS, Adaptive Connectivity, and WiFi preferences — which can silently degrade performance.
• Corrupted DHCP or DNS cache: The update process can leave stale network state that causes DNS timeouts, making the connection feel slow even when raw throughput is fine.

Fix 1: Wait 30–90 Minutes After Rebooting

This sounds unhelpfully simple, but it’s the correct first step. After an update reboot, Android performs intensive background work: recompiling apps, running Play Protect scans, downloading app updates, and backing up data. All of this peaks in the first hour and can drag WiFi throughput down to 20–30% of normal. Let the phone sit on the charger, connected to WiFi, for at least an hour before concluding there is a real problem. If speeds return to normal on their own, no further action is needed.

Fix 2: Check for a Follow-Up Patch

Google frequently releases supplemental updates within days of a problematic monthly patch. Go to Settings → System → System update and tap Check for update. For Pixel 10 users affected by the January 2026 WiFi and Bluetooth issues, Google released a targeted OTA patch (build BP4A.260105.004.E1) that resolved the regression. Installing the follow-up patch is always faster than trying every workaround manually.

Fix 3: Toggle Airplane Mode

A quick radio stack reset often clears post-update WiFi slowdowns caused by stale state left over from the update process. Pull down the notification shade and tap the Airplane mode tile to enable it, wait 10 seconds, then tap it again to disable it. Your phone will re-initialize both the cellular and WiFi radios from scratch. This takes about 15 seconds and fixes a surprising number of “connected but slow” complaints.

Fix 4: Disable Adaptive Connectivity

Adaptive Connectivity is a Pixel-specific feature that automatically switches between 5G, LTE, and WiFi to save battery. After an update, it can become overly aggressive, throttling WiFi throughput to preserve battery even when the phone is plugged in and you need full speed. To disable it:

1. Go to Settings → Network & internet → Adaptive Connectivity.
2. Toggle Adaptive Connectivity off.

After disabling it, run a speed test to see if throughput recovers. If speeds return to normal, Adaptive Connectivity was the culprit. You can leave it off permanently or re-enable it once a follow-up patch arrives.

Fix 5: Change Private DNS to a Fast Resolver

Android updates occasionally reset the Private DNS setting or change its behavior. If the configured DNS server becomes unreachable after an update, every web request starts with a 2–5 second timeout before falling back — making the connection feel devastatingly slow even though raw bandwidth is fine. Fix it by setting a reliable DNS resolver:

1. Go to Settings → Network & internet → Private DNS.
2. Select Private DNS provider hostname.
3. Enter dns.google (Google’s DNS) or one.one.one.one (Cloudflare’s DNS), then tap Save.

Both resolvers are globally distributed and extremely fast. The change applies to all networks immediately and does not require a reboot.

Fix 6: Disable WiFi Scan Throttling (Developer Options)

WiFi scan throttling limits how aggressively Android scans for nearby networks in order to save battery. When enabled after an update, it can slow the phone’s ability to maintain a fast connection, particularly on mesh networks where the phone needs to roam between nodes. To disable it:

1. If Developer Options is not already enabled, go to Settings → About phone and tap Build number seven times until you see “You are now a developer.”
2. Go to Settings → System → Developer options.
3. Scroll down to the Networking section and toggle Wi-Fi scan throttling off.

Fix 7: Forget the Network and Reconnect

Cached WiFi credentials and connection metadata can become corrupted during an update, causing the phone to negotiate a slower connection profile. Forgetting the network and re-pairing forces a clean handshake:

1. Go to Settings → Network & internet → Internet.
2. Long-press your WiFi network and select Forget.
3. Tap the network again, enter your password, and reconnect.

If your router supports both 2.4 GHz and 5 GHz under a single band-steered SSID, try connecting to a dedicated 5 GHz SSID instead. See our 2.4 GHz vs 5 GHz vs 6 GHz comparison for guidance on which band to use and why.

Fix 8: Reset Network Settings

A full network reset wipes all saved WiFi networks, Bluetooth pairings, mobile data settings, and VPN configurations — but does not touch apps, photos, or personal data. It is the most thorough software fix short of a factory reset:

1. Go to Settings → System → Reset options.
2. Tap Reset Wi-Fi, mobile & Bluetooth (on some Pixel models these are split into two separate options — reset both).
3. Tap Reset settings and confirm.

After the reset, reconnect to your WiFi network and re-pair any Bluetooth devices. Then run a speed test to confirm throughput is back to normal.

Fix 9: Sideload the Correct OTA Package

If the issue persists and no over-the-air patch is available yet, you can manually sideload the full OTA package for your exact build. This re-flashes all system partitions including the radio firmware without wiping your data:

1. Find your current build number at Settings → About phone → Build number.
2. Download the matching OTA package from Google’s Android OTA images page (search “Google OTA images” for your Pixel model).
3. Enable USB debugging in Developer Options and connect the phone to a PC.
4. Run adb sideload [filename].zip from a terminal with ADB installed.

This is an advanced fix best reserved for cases where the WiFi regression is severe and no patch is yet available. Sideloading the correct OTA does not unlock the bootloader or void your warranty.

Quick Checklist

1. Wait 30–90 minutes after the update reboot before troubleshooting
2. Check Settings → System → System update for a follow-up patch
3. Toggle Airplane mode on and off to reset the radio stack
4. Disable Adaptive Connectivity in Network settings
5. Set Private DNS to dns.google or one.one.one.one
6. Turn off Wi-Fi scan throttling in Developer Options
7. Forget your WiFi network and reconnect
8. Run a full Reset Wi-Fi, mobile & Bluetooth from Reset options
9. Sideload the full OTA package as a last software resort

Most post-update Pixel WiFi slowdowns resolve within the first three or four steps. If you’ve worked through the entire list and speeds are still slow, the issue is likely a firmware bug that requires a future patch from Google — check the Pixel Community forums and watch for the next monthly update. In the meantime, using the 5 GHz band and a fast DNS resolver will give you the best possible speeds on the affected firmware. For broader speed optimization tips, see our guide on how to reduce WiFi latency.