J7 is a superb phone.camera quality is very good. And also performance is superb.and front flash camera. I love it.super faster. Prossere.sound is nice. And I am happy. I was just experiencin a single problem that is not receiving watsapp notification until I open the application.well the problem was solved
Goto settings - open data usage - scroll down to open WhatsApp - scroll down and uncheck the restricted background data
WORKED FOR ME enjoy with j7 guyz.gud phone under bullet.
Thank u so much.