I have purchased opportunity a37f. After 15day hang issue iam facing. And the oppo only say Cemera cemera. But his cemera also no good I hate these phone. This phones only good thing that his mattlic body. And only 2 gb ram. Iam not suttisfide with this product full money West. Oppo a37f ok ok product. My oppo a37f hanging issues that why iam purchase other brands smartphone.