Lenovo vibe k5 is the best mobile and I am using this phone and there is no problem related hardware and software technology. good speed 4 GB ram that provide good speed and make very good feeling while playing game. it also has enough memory 32 GB rom and support 128GB . it also has big resolution 5.5 inch screen very good touch screen, camera is also very good and it takes very clear picture . primary camera 13 megapixel very good quality and front camera is superb with 8 megapixel very good for selfie pic with flash. if we talk about battery backup it is also very good u can never feel battery frequent discharge problem 3500 mAh li-ion polymer battery. it has advance new version helo p10 64 bit processor. I have a great experience with this mobile handset .