OPPO mobile phone will be randomly attached with a transparent water shell in the packaging box of the mobile phone when it is delivered from the factory. Although the quality is not the best, it can be used. Some special versions of mobile phones may be attached with a special mobile phone case because of the joint name, and the material is better than that of ordinary mobile phone cases. So when you buy a mobile phone, you can look at what shell it comes with.
OPPO mobile phone factory standard equipped with a mobile phone case, if you have higher requirements for the mobile phone case, the price of different mobile phone cases may be different, you can go to Taobao or offline mobile phone accessories store to see, depending on the specific situation