Upgrade — Android 5.1.1 To 8 ((new))

No Google Play Store after boot. Solution: You forgot to flash GApps. You must re-wipe and flash ROM + GApps together before booting.

Before you can upgrade to Android 8, you'll need to ensure that your device meets the following requirements: upgrade android 5.1.1 to 8

Before you get excited, you need to understand the two distinct paths to upgrading from 5.1.1 to 8. No Google Play Store after boot

Your stock recovery won't install Android 8. You need TWRP. Before you can upgrade to Android 8, you'll

Upgrading to Android 8 can be a complex process, and there are risks involved. These include:

Furthermore, the security disparity between 5.1.1 and 8.0 is vast. Android 5.1.1 predates the granular "Runtime Permissions" introduced in Marshmallow. In the Lollipop era, users accepted a "take it or leave it" list of permissions at the time of installation. By upgrading to Oreo, users gain the ability to toggle specific permissions—like location or microphone access—at any time. Oreo also introduced "Google Play Protect" and stricter verified boot processes, shielding the user from a modern landscape of mobile malware that the outdated Lollipop kernel is ill-equipped to handle.