For the best performance on this aging device, stick with the final official release for your region and disable/uninstall all unused system apps via ADB (without root).

The Samsung Galaxy J2 Prime (model numbers: SM-G532G , SM-G532M , SM-G532F , SM-G532MT ) is an entry-level smartphone released in 2016. Like any Android device, its proper function depends entirely on its firmware — the low-level software that controls the hardware. What is Firmware for the J2 Prime? In simple terms, the firmware is the device’s operating system (Android) plus the proprietary drivers and system files provided by Samsung. It manages everything from touch response and Wi-Fi connectivity to battery charging and camera function.