Hi friend, I am also using the the samsung galaxy j2 ace. No of problems are facing in 6 months. Price is very high and no good facility are provided. Only 1.5 GB ram , only 8 MP and 5 MP camera.
In case of oppo, viva are gives very good quality camera and ram and other facility only in 6000.
Battery also only 2600 mAh and always heat battery.
Display also very small only 5 inch.
Camera 8 MP but very poor quality.
Ram very low only 1.5 GB therefore no more application are at same time.
internal sotage also very less only 8GB as compare to its price 8000.