I bought Sony Xperia ZR in year 2014 from Flipkart.com after passing my 10th board
The phone has 2gb ram which work good with multitasking and runs with snapdragon processor
Overall for speed and processor no issue
Do multitasking smoothly and runs normal no lag
It has 13.1MP camera which capture good depth photo it also has image stabilization and has autofocus and all the basic features
The phone has 4.5 inch quad hd TFT display which is old and the screen consumes more battery
The phones do not compromises with sensors and has
Accelerometer
Gyroscope
Compass
Light or ambient sensor
And so you can watch 360videos in your vr box and can also.enjoy vr games
The gaming performance of this phone is also good though it heats when playing high end games but runs games smoothly
But an issue is you only get approx 4GB of free space and after installing updates the internal memory get full
Nearly only 1-2GB is free
After applying 4+ updates and now is running on lollipop
Overall this phone is old and not fits in today life but it is balanced phone and lag free so.devision is yours