I have personally used the J5 phone from since last year there are amazing features in thats cell phone.if I tell you the battry of that cell phone so high quality and along with 5.1android version.Another great news about that the price of these cell phone are not downing in the market I am tell you that I have bought on 21000 rupees last year .Another amazing features of thise cell is thats they are support any type of software.i think that in J series cell phone the most powerfull and supportable cell phone is J5.On the basis of internet these are 4G settup from the company.Charging capacity are more and quickly charging from low voltage electrycity.