There are many custom roms for samsung galaxy j2 200g but these custom roms are best within them :-
1-[ANDROID-6.0] LEGEND ROM for Galaxy J200G
BUGS :- GPS not working
link:-https://forum.xda-developers.com/galaxy-j2/development/android-6-0-legend-rom-galaxy-j200g-t3772848
-------------------------------------------------------------------------------------------------------------------------------------------------- 2-Samsung Galaxy J2 Nougat Update
BUGS:-No Fm Radio
Offline Charge Working But No Animation
link:-https://sourceforge.net/projects/j23g/files/RR/RR-N-v5.8.5-20180214-j23g-Final.zip/download
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3-Noble Rom for Samsung galaxy j2 j200g
android version:-5.1.1 Lollipop. BUGS:-N5 Aircommand Not Working
link:-https://mega.nz/#!jJEjTAIR!oJM0MOuRPyaCOsP810MCWTUxEyVRO4TJzxCM3ikDxks
