Avoid buying a any oppo phones

I am struggling with my oppo Reno Ak17 There is not much storage on it When you play a game it starts lacking and if your lucky it stays in the game but not always and it's still on a contract Sometimes when you playing a game then it lacks and then the screen goes black after 3 minutes of manual functioning you can work with it again I am very unhappy with my phone if I knew this phone is so bad I would have stay at Hawaii