Every thing is perfect in Lenovo k4 note. The speed and accuracy is very good. never hanged. The Ram is too good that is 3gb Ram. internal storage is also good that is 16 gb. The rear camera is too fantastic to take selfi. Long battery back up is too good as compare to other phone.fast charging.run very smooth. Dolby system in this phone to listing song. Sound is very clear. I hope u like this phone.