Well I m using this phone from last one year. I have not come a cross any problem occur between this one year
The backbone of this device .
1) LONG LASTING BATTERY
2) POWER FULL PROCESSOR
3) UP TO DATE WITH NEW OPERATING SYSTEM
4)AUDIO AND VIDEO INTERFACE IS(unbelievable)
THE OVER ALL PERFORMANCE IS VERY GOOD.if you r planning to any handset .
SAMSUNG GALAXY J7.WORTH IT TO BUY
speaking to my personal experience .