im thinking my phn is not providing enough power to run games smoothly in starting 10-15 days every game was running so smoothly without fps drop but now i started to get fps drop lag in game.what should i do?
That's still not low enough for games to lag. There's probably something holding your phones performance back but it's still at flagship level so all games should run smoothly even with 340 http://www.antutu.com/en/ranking/rank1.htm