mobile

Ever since I upgraded from 4.2.2 to Stock MJ9 OS 4.3 (Flashed via Odin) in which samsung released it with lot of bugs, my phone becomes too slow and laggy. Apps and games are closing automatically and takes me to homescreen and while listening to song, the app is closing by its own after sometimes. Also using play music and game at the same time, play music closing automatically and after 5 to 10 mins games too closes and take me to homescreen. After that I flashed many custom ROM over it after full data wipe in cwm. Also did factory reset. But the problem remains. Currently using kitkat 4.4.4 with these problems and others using the same rom haven't faced any probs. So plz help me 😢😟😔

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