For a phone with 1GB of RAM, Android Oreo (specifically lightweight custom ROMs) breathes new life into the hardware, making it usable in the modern era, provided you are willing to accept a few compromises.

System files take up a large portion. You will absolutely require a fast microSD card. How to Prepare and Flash Android Oreo Custom ROM

You get notification channels, clean notification dots, and the ability to snooze alerts.

Because Samsung never released an official Oreo package for this device, you must rely on third-party custom firmware developer builds. Popular projects like LineageOS or clean AOSP ports are your best bet for a stable daily experience. Step 1: Back Up Everything

Upgrading from Lollipop to Oreo gives a legacy smartphone a massive boost in capability. : The

Unfortunately, the Galaxy J2's hardware specifications don't meet the official requirements for Android Oreo. The device's 32-bit processor and 1GB of RAM are insufficient to handle the demands of Android Oreo.

Oreo offers a cleaner, more modern UI compared to the outdated TouchWiz interface found on the original SM-J200G.

If you have weighed the risks and still want to proceed with a custom ROM, you will need to prepare thoroughly:

To help you get started with the upgrade process, let me know: Do you already have installed on your device?

Lightweight versions of essential apps (Google Go, YouTube Go, Maps Go) run smoothly without exhausting CPU cycles. Enhanced User Interface and Features

Background data restriction helps save on limited storage and data plans. 3. Modern Features