Zuk z1 is advanced technology mobile in very reasonable price I also using its camera quality is very awsom in every click it take 6- 8 mb for per pic in high resolution like DSLR I recommend this mobile to my every Dear once.about sound it have only one qualitied speaker with full base quality like iphone front camera is alsonice for selfie one and the best thing in this mobile is every one can customize this phone with any rom like n7.1.1 which is officially not launched but I am using mokee 7.1.1 rom with more best features