I am using samsung j7 more than 5 months the battery function of samsung j7 is very good and the desine of Samsung samsung j7 is very nice I like samsung j7 and I have given advice to my friends to buy this phone . Samsung j7 is vwry powerful by 1.6Ghz octa core it comes with 2GB of ram the phone packs 16GB of interal stroge that can be expand up to 128GB via micro SD card