I utilize Samsung system J7 of model number SM-J700H and android rendition 5.1.1. I like this telephone since it has great sound gathering. It has cool style and outline. Samsung cosmic system J7 look beautyful in gold shading. I generally play amusements alot however it never get warmed up like other telephone. It is sturdy and reliabililty. In samsung world J7 the cool HD show is useful for viewing flims and playing amusements. The 1.5 GB RAM permits to play the amusements like G.T.A San-Andreas and never get warmed and hanged. It go ahead sensible cost. I have utilize many telephone, they keep going for just 1-2 months yet I have been utilize samsung cosmic system J7 from its discharge date and it is not harmed.