Google’s Android 5.1 Lollipop update was a 2015 release, and the Nexus 6 was included in Google’s announced rollout list. The Android Developers Blog said updates would reach a group of Nexus devices over the following weeks. That wording matters: an announcement did not mean every phone received an over-the-air update on the same day. Carrier, region and rollout timing could affect when an eligible device displayed the notification.
What Google announced
Google’s developer announcement named Nexus 6 alongside Nexus 4, Nexus 5, Nexus 7 models, Nexus 9, Nexus 10 and Nexus Player. Android 5.1 continued the Lollipop release line and added platform improvements described in Google’s release materials. The Android 5.1 SDK was also relevant to developers testing applications against the updated platform. This historical release list should not be confused with the current Android version or present-day device support.
How an over-the-air rollout worked
For a supported Nexus phone, the normal approach was to wait for the system update notification and install it while the device had enough battery and a stable connection. Rollouts were staged, so two owners could see the update at different times. A missing notification did not prove that the device was excluded; it could simply mean that the staged release had not reached it yet. Exact instructions depended on the build and carrier variant.
Why manual flashing needs care
Google publishes factory images for supported devices, but flashing software is an advanced procedure that can erase data or leave a phone unable to start if the wrong image is used. A package must match the exact device and build. A factory reset or unlocked bootloader can also affect personal data and device security. Old tutorials that recommend bypassing checks or using files from unofficial mirrors should not be followed casually.
The Nexus 6 is now a legacy device
The update described here belongs to the Nexus 6’s product history. The phone no longer receives current Android releases or routine security updates from Google. Installing Android 5.1 today would move the device to software that is many years out of date; it would not make it secure for banking, work accounts or sensitive personal data. A phone that still runs should not be mistaken for a phone that remains supported.
What owners should do today
If you still use a Nexus 6, avoid relying on it for accounts that require current security patches. Back up data before changing firmware, remove sensitive accounts if retiring the device, and recycle or repurpose it only for low-risk uses. If your goal is an updated Android phone, choose a model that still receives manufacturer security updates and verify the support window before buying.
Google’s 2015 announcement confirms that Nexus 6 was part of the Android 5.1 rollout plan. The useful present-day lesson is to distinguish historical update coverage from ongoing support. The date and device list are archival facts; they are not instructions to flash old firmware or evidence that the Nexus 6 is safe to use now.
Related reading: Android 5.1 on Nexus 6: The Historical Rollout and Safe Update Checks.
