There is no official Android 12 update for the Samsung Galaxy J8. It is not possible to get Android 12 through official Samsung channels.
LineageOS is a free and open-source operating system for smartphones and tablets, based on the official Android releases. It is the successor to the famous CyanogenMod. Developers have successfully ported Android 12 (and even Android 13) to the Galaxy J8 hardware, allowing users to experience the new features without buying a new phone. Samsung J8 Update Android 12
While Samsung has stopped support, the developer community has not. If you are tech-savvy and willing to void your warranty, you can indeed run by installing a Custom ROM. There is no official Android 12 update for
Samsung Galaxy J8 Android 12 Update: Everything You Need to Know It is the successor to the famous CyanogenMod
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The Galaxy J8 (2018) followed Samsung's standard policy for mid-range J-series devices at the time, receiving two major OS upgrades: Android 8.0 Oreo. First Major Update: Android 9.0 Pie (One UI 1.0). Final Major Update: Android 10 (One UI 2.0).
If you need Android 12 for specific app compatibility or security, it may be time to consider an upgrade to a newer Galaxy A-series model. However, for those who love to tinker, the custom development community is your only path to a newer OS. for installing a custom ROM? Galaxy J8 (SM-J810G) - Notify Update