This product are batter than other brand also it is very nice product its video quality excellent and sound quality also good for air and it's cemera quality most powerfull like DSLR.it available in online marketing like amazon, or more online marketing site which is provide this samsung galaxy M4O android mobile phon.i like to this mobile phon because it is best for me and you.Like it is tuch to very good.one must of the it's quality is battery power.one time full charge then is going to 5 or 6 hours depend of you.it is very nice product so I like to this product.