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
If your device is eligible for this update and hasn't received it, you can check manually: How to check & update your Android version android 5.1 1 update download
: Support for crystal-clear HD Voice calling was standardized for compatible hardware. How Users Downloaded the Update Lollipop MR1 Android 5