Running Android 5.1.1 in 2026 comes with serious risks:
Recommendation: If possible, upgrade to a custom ROM like LineageOS 18.1 (Android 11) or newer. For critical use, replace the device.
Published: April 20, 2026
Category: Firmware Updates
While Android has moved on to newer versions like Android 15 and 16, many legacy devices—especially in the industrial, automotive, and budget sectors—still rely on Android 5.1.1 Lollipop. This update, released by Google in 2015, remains the final and most stable version of the Lollipop generation. android 5.1 1 update download
If you own a device still running Android 5.1 or earlier, here is everything you need to know about the 5.1.1 update, where to download it, and how to install it.
Google still hosts factory images for Nexus devices. For other brands, you will need community sources.
File sizes: Typically 500 MB to 1.5 GB depending on the device. Running Android 5
Android 5.1.1 was a minor but crucial maintenance release. Key improvements include:
Note: This update does not bring new features like Material Design 2 or modern permissions. It is purely a stability and security polish for Lollipop.
Once you have the correct android 5.1 1 update download file (usually a .zip or .tgz file), follow these steps. Recommendation: If possible, upgrade to a custom ROM
Google provides Factory Images for Nexus devices (the primary hardware for Android 5.1.1). This involves downloading the specific OS build from the Google Developer repository.
Procedure: