Installing a custom ROM on your Samsung Galaxy J4 (SM-J400F)
Custom ROMs are installed through a custom recovery like TWRP. Download the correct TWRP (.tar) file for the SM-J400F. on your PC and place the TWRP file in the Connect your phone in Download Mode and click Immediately after it finishes, hold Volume Up + Power to boot into TWRP recovery. Step 3: Flash the Custom ROM Once in TWRP, you can install the new OS. Wipe > Advanced Wipe and select Data, Cache, System, and Dalvik wipe Internal Storage if your ROM file is there. , locate your ROM file (usually a file), and swipe to confirm. : If the ROM doesn't include Google apps, flash a package immediately after the ROM. Reboot System . The first boot can take up to 10 minutes. Recommended ROM Types for J400F j400f custom rom
What is your (e.g., better battery, faster performance, or newer Android version)? Does your device have 2GB or 3GB of RAM ? Are you experienced with using Odin and ADB ? J4LTE GSIs download | SourceForge.net Installing a custom ROM on your Samsung Galaxy