Google Pulls Then Replaces the Pixel 11 September Patch

Google posted a second September software build for the Pixel 11 series on September 9, after the first patch stalled. The new package is CD1A.260905.001.B1. It is still Android 17, not the quarterly drop owners have been waiting for.

The download is about 97 MB. The only on-screen note is Google’s stock line about critical bugs and stability.

Google Pulled the First September Build

The Pixel 11, Pixel 11 Pro, Pixel 11 Pro XL, and Pixel 11 Pro Fold went on sale on August 20 running Android 17. Twelve days later, on September 1, an OTA moved some of those phones from CD1A.260714.001.A9 to CD1A.260905.001.A1. The security patch level on that prompt read September 1, 2026, not the usual September 5 date.

Not every owner saw that prompt. Google never listed A1 on its public image pages, and the rollout appeared to stop. Phones that did take A1 then received another package. On September 9, 20 days after launch, B1 showed up as the September file for all four models.

THE PIXEL 11 SEPTEMBER PATCH CALENDAR

1. August 20, 2026: Pixel 11 series goes on sale on Android 17 with the August security patch.
2. September 1, 2026: An OTA to CD1A.260905.001.A1 starts, carrying a September 1 security patch.
3. Early September 2026: A1 stops reaching some phones and never appears on Google’s public image lists.
4. September 9, 2026: Google posts matching factory and OTA files for CD1A.260905.001.B1, labeled Sep 2026.

That sequence is the software-phone pitch working the hard way. Google patched a three-week-old flagship twice before it would name a single fix in public.

97 MB and a Stock Bug-Fix Line

Owners who already had A1 describe a follow-up download of about 97 MB. The install screen uses the same generic copy Google puts on routine security builds.

THE B1 PACKAGE AT A GLANCE

• Build: CD1A.260905.001.B1, still Android 17.0.0, not QPR1.
• Size: About 97 MB for phones that already took the September 1 package.
• Patch date: September 1, 2026, a few days ahead of the usual September 5 stamp.
• Scope: Pixel 11, Pixel 11 Pro, Pixel 11 Pro XL, and Pixel 11 Pro Fold only.

The prompt says the update “fixes critical bugs and improves the performance and stability of your device.” There is no bug list, no feature list, and no Pixel Drop notes. Visual changes tied to Android 17 QPR1 are not on this build. Google is cleaning the launch image in silence, then saving the named drop for later.

The Camera App Carries the Video Boost Fix

The launch complaint Google has actually owned is not a mystery radio bug. It is Video Boost, the camera feature that sends footage for extra color, light, and stabilization. Owners found bursts of static in the soundtrack, often about every five seconds, on clips recorded with the feature on. Some traced it to Audio Zoom. Clearing the Camera cache and turning Audio Zoom off stopped it for several people.

A Google spokesperson answered that report on September 1, the same day A1 started moving.

We have identified the cause and developed a software fix that will rollout to users in the coming weeks via the Camera app. Additionally, further performance optimizations will be included in an upcoming monthly Android update.

Google spokesperson, September 1, 2026

That split matters more than the file size. The static fix is scheduled as a Camera app update. Extra tuning may arrive in a later monthly Android package. B1 might be that monthly package, or it might be a security blob that never touches the microphone path. The changelog does not say which. Anyone treating this OTA as the Video Boost cure is guessing.

Which Pixel 11 Launch Bugs Are Still Open?

Early Pixel 11 owners have logged a short, familiar list: screens that light up on a table, radios that drop, apps that close, and a few phones that die during a reset. Google has confirmed one item on that list. The rest still live as owner reports and workarounds.

LAUNCH BUGS AND WHERE THE FIXES SIT

• Video Boost static: Google says a Camera app fix is coming in the following weeks, with more tuning in a later monthly Android update.
• Lift to Check: Screens wake from small bumps and even a sharp turn in a car. Turning the gesture off stops it. Google has not commented.
• Wi-Fi, 5G, and Bluetooth: Some phones show 5G with no data, drop Wi-Fi, or lag on car Bluetooth. A few owners say the September 1 package calmed weak Wi-Fi, random reboots, and data drops. That is still owner testimony, not a Google note.
• App crashes: Apps close with no clear pattern, including music skipping in Spotify. Google has pointed people at third-party apps and a Safe Mode check.
• Reset shutdowns: Reviewer Dhruv Bhutani said his Pixel 11 Pro went into a shutdown loop after a factory reset. Similar cases show up in support threads. That is swap territory, not a 97 MB delta.

Google also moved this generation to MediaTek’s M90 modem after years on Samsung Exynos silicon. The point of that switch was cleaner radios and less idle drain. A subset of new phones is still describing 5G icons with no internet, Wi-Fi that dies after a few minutes, and handoffs between 2.4 GHz and 5 GHz that never settle. If B1 contains modem firmware, Google did not say so.

Cubs, Grizzly, Kodiak and Yogi

Google’s public OTA list, last stamped September 9, now shows one September row for each Pixel 11 body. The A1 build is absent. B1 is the file that replaced it.

PIXEL 11 BUILDS ON GOOGLE’S OTA PAGE

August factory rows still sit above those September files. The non-fold phones shipped with CD1A.260618.001.A7, CD1A.260618.001.C2, and CD1A.260714.001.A9. The Fold’s early rows were CD1A.260618.001.A9, CD1A.260618.001.C3, and the same CD1A.260714.001.A9 launch build. Google has not labeled which of those August images map to which carrier or region, a change from last year’s Pixel 10 lists.

Factory Images Skip A1 Entirely

If the updater never appeared, the path is still the usual Pixel one. Open Settings, then System, then Software updates, then System updates, and check for a download. Phones that already installed A1 should be offered B1 as well.

Google also posted the B1 files among its factory images for Nexus and Pixel on September 9. Flashing those images wipes the device. For a repair that keeps data, Google’s own note is to sideload instead. The matching zips are on the full OTA images for Pixel devices list under cubs, grizzly, kodiak, and yogi, each tagged 17.0.0 and Sep 2026.

Sideload still means USB debugging, recovery, and adb. Most owners can wait for the prompt. The public files matter because A1 never made that page. B1 is the first September build Google is willing to leave in the open.

QPR1 Still Has Not Left the Beta Queue

This package is easy to mistake for the first Android 17 quarterly release. It is not. QPR1 is still expected in September, and it is the build that usually arrives with the named Pixel feature drop. Older Pixels are waiting on that same quarterly train. Pixel 11 is getting hotfixes on the original Android 17 image while that train stays in the station.

The calendar already has a stranger split. Android’s developer site already hosts Android 17 QPR2 beta OTA packages for Pixel 11, even as the launch build is still being patched. Testers can jump two quarterlies ahead. Retail phones are still on a 97 MB blob whose notes refuse to name a bug.

Some early radio and reboot complaints did ease after the September 1 package, according to owners who kept notes. Video Boost is on a Camera app clock Google set itself. Lift to Check still has a toggle for a workaround and no public fix date. B1 may close more of that list. Until Google prints the list, the only honest status is the build number on the phone.