GrapheneOS based on Android 16 is now available in our Beta channel. There are 2 main known issues which will be fixed in the next release: lockscreen date and media info are not properly displayed due to an upstream AOSP bug and Pixel Thermometer doesn't appear in our App Store.

Last month, we provided the 2025-06-01 Android/Pixel security patch level early in the month before the stock OS release as preparation and then backported Android 16 firmware and kernel/userspace driver patches to provide the 2025-06-05 Android and then Pixel patch levels.

Our 2025062700 release raised the overall patch level to 2025-07-01 since we got early access to it with a verifiable signature and know we already provide the patches. We usually do an early Android Security Bulletin release before the stock OS but it was done for July in June.

Android Security Bulletins are backports of High/Critical severity patches to older Android. Starting this month, the initial release of Android 16 is one of those older releases. It's split into AOSP userspace patches (YYYY-MM-01) and driver/firmware/Linux patches (YYYY-MM-05)

YYYY-MM-05 patch level has a device-specific portion with more driver/firmware patches. For Pixels, it's the Pixel Update Bulletin. Most Pixel Update Bulletin patches aren't specific to Pixels but the Android Security Bulletin doesn't cover Samsung cellular, Broadcom Wi-Fi, etc.

Pixel Update Bulletin patches are what we had to backport to Android 15 QPR2:

https://source.android.com/docs/security/bulletin/pixel/2025-06-01

These were for firmware/drivers/services for Samsung cellular (including the Radio Interface Layer), Broadcom/Qualcomm Wi-Fi/Bluetooth, NVT touchscreen, fingerprint and TPU.

The only part truly specific to Pixels was the TPU patch. Bear that in mind when you look at those Pixel Update Bulletins. Other devices are meant to have their own bulletins covering the same things if they use those components and also further patches. It's fully up to OEMs.

Android Security Bulletin (ASB) is published on the first Monday of the month unless it's a US/Google holiday in which case it gets pushed ahead a day or two. The Android release for the month is a separate thing from the ASB backports, usually published the day after the ASB.

ASB is likely July 7 and the Android OS release is likely July 8. Our aim is to have Android 16 in our Stable channel prior to July 8 so we can ship the initial monthly update to Android 16 instead of needing to backport Pixel Update Bulletin patches which could be infeasible.

Each month, Android has a new stable OS release. It's a monthly, quarterly or yearly release. Quarterly and yearly releases move along the development branch about the same amount and have a similar amount of changes. Those have months of public Developer Previews / Betas first.

Pixels ship the latest monthly, quarterly and yearly release each month. Non-Pixels ship an initial yearly Android release and then only Android Security Bulletin backports until they ship the next yearly release. ASB backports are a subset of the AOSP patches, not all of them.

GrapheneOS needs to follow the stable releases in order to provide the full AOSP privacy/security patches. It also needs to keep up with them in order to ship Pixel driver/firmware patches which are made for the latest stable release, but we'd still need to do this on non-Pixels.