I purchased Samsung A5 in August last year, since then I am not facing any difficulty with this phone. As it is a 4G network phone, I am using Jio sim in it and experiencing a great speed of internet. Not only the speed of internet is very good but also the speed of its RAM with 2GB speed which gives a flawless operating experience. Its 1.2 GHz quad core processor also enhancing the speed. The qualm core snap dragon chipset is very fit for gaming experience to oh my god. It comes with Gorilla glass fixed on its display made it anti-breakable from any sudden impact on it. No problem faced regarding quality of network, clarity of calling voice yet. Its 5 inch screen is very handy to a normal adult person. The resolution of picture is very nice. The camera, ohhh.it not just nice. it’s superb. The quality of pictures(photographs) taken from its 8 MP front and 13 MP rear camera is extremely high quality. The videos recorded under HD mode of it gives a crystal clear visual. Audio recording is also superb. At the time of purchasing, it’s operating system was KITKAT and now it upgraded to MARSHMALLOW. I hope in future when the NOUGAT operating system will be released in OTA, it will be upgraded to that also. But for the time the speed and user friendly operating system is giving an excellent operating satisfaction to me.