Hii Friends! Lenovo is a best product. I using Lenovo Vibe K5. Its Design is very good. Lenovo Vibe K5 is using a plastic body with metallic finishing and quality and finishing is very good. Power button and volume rocker is on the right side, audio jack and micro USB port is on the top it is good.The 4G works on both the SIM slots. Its Screen is 5 inch IPS screen with 1280 x 720p resolutions. This handset is loaded with good number of sensors – accelerometer, proximity, light, gyro and magnetic. Vibe K5 has 2GB RAM and 16 GB ROm. There is micro SD card support too. Apps are getting installed on internal storage and there is option to move them to external storage. This handset is has Qualcomm Snapdragon 415 64 bit 1.4GHz octa core processor. Performance is smooth. It has 13MP primary camera and 5 MP secondary camera. But Lenovo vibe K5 camera is Average. There are dual Speakers on back and sound output is loud and clear. I did not face any issues with in call quality, network signal etc, 4G, WiFi, GPS and Bluetooth worked well. Battery is 2750mAh in this handset.It took me 2 hour 30 minutes to charge the handset using wall charger from 0% to 100%. Battery life is decent. Its price is good. Lenovo Vibe K5 is a good handset but not the best.