Android Oreo[1] system images have been released by Google[2] soon after the company announced the official name[3] of the eight major build of its mobile operating system. The Android 8.0 Oreo OTA update has started to roll out, but will likely hit devices in phased manner, and will first arrive for Android beta program users. Also, as is the case with initial rollouts, things aren't going as smoothly as one would expect from Google. Some initial installers reported that the OTA update was failing to install on their devices, showing an 'installation error'.
Some initial installers reported (courtesy[4] Android Police) that the OTA update was failing to install on their devices, showing an 'installation error'. According to Android Police[5], Pixel XL users running developer preview 4 are particularly facing this issue, and Google temporarily even pulled Pixel[6] and Pixel XL[7] OTA updates to fix this issue. Pixel users running Nougat, and Nexus 6P[8] and Nexus 5X[9] users on the beta program have received the update, and could install them without any hiccups. However, Google was quick to respond and resolve the issue, with Android head Dave Burke claiming[10] it was a signing issue fault.
The OTA roll out is phased, and for now only Android Beta Program users are receiving it mainly. Google will likely make it available to a wide audience in the near future. OTA updates are the safest way to install these updates, as they refrain from deleting your smartphone data, while factory images require flashing your phone and giving it a fresh start.
If you cannot wait, then Android Oreo system images[11] are...