Almost all of us are afraid of smartphones so that it does not fall into the water. To get rid of this fear, smartphone companies have added a feature called Waterproof their smartphone. This feature is not for all smartphones. If you use Oppo A77, you will not get this feature either.
The Oppo A77 is one of the best phones on the market. As good as it looks, its performance is also great. However, the phone missed a feature. That is the waterproof feature. Thus, it is more likely to be damaged if it falls into the water. It is not able to absorb water from inside. You have to use a waterproof case to protect this phone from water.