Android 5.1.1, known as , was the final major refinement of the Lollipop era, focusing primarily on performance and stability. As of April 2026, this version is officially obsolete and no longer receives security updates from Google. How to Download and Install

Modifying your device's software carries inherent risks. The author is not responsible for bricked devices, lost data, or nuclear war. Always verify checksums (MD5) of downloaded files before flashing.

For Nexus devices, official OTA .zip files can still be found on archive sites.

Android 5.1 - 1 Update Link Download

Android 5.1.1, known as , was the final major refinement of the Lollipop era, focusing primarily on performance and stability. As of April 2026, this version is officially obsolete and no longer receives security updates from Google. How to Download and Install

Modifying your device's software carries inherent risks. The author is not responsible for bricked devices, lost data, or nuclear war. Always verify checksums (MD5) of downloaded files before flashing.

For Nexus devices, official OTA .zip files can still be found on archive sites.