The Samsung Galaxy J4 (SM-J400F), a budget staple from 2018, has maintained a surprisingly active life in the modding community thanks to its . While development for dedicated custom ROMs has slowed, the device is a prime candidate for Generic System Images (GSIs) , which allow it to run much newer versions of Android than its official Android 9.0 Pie limit. The Landscape of J400F Modding
Leo smiled in the dark of his room, the blue glow of his patched-together J400F casting long shadows. He typed back: “Send me the device tree.” j400f custom rom