How to Check for Android Updates
Following these steps will also tell you which version of Android your smartphone is running.
How Android Updates Work
Google periodically pushes upgrades to the firmware on an Android phone by sending the updated information through a cellular or Wi-Fi connection. When the phone is turned on, notification of the available update appears on the screen. These updates are rolled out in waves by device makers and carriers, so updates aren’t available to everyone at once. That’s because firmware updates must be specifically compatible with the hardware on a phone, unlike apps, which work with a wide variety of devices. Firmware updates require permission, time, and a device restart. Because Android is a fragmented operating system — different device manufacturers and cellular carriers configure it separately — updates roll out at different times to different customers. The first recipients of any new upgrade are Google Pixel users because updates are pushed directly by Google without being reviewed or modified by a carrier. Users who have rooted their phones (that is, modified the device on a basic operating system level) may not be eligible for over-the-air carrier updates and must reflash the phone to update to the newest Android version that is optimized for their device. A firmware upgrade is unrelated to app upgrades pushed through the Google Play Store. App updates do not require vetting by device manufacturers or cellular carriers.
