Originally Posted by
Subrata Jana Call recorder is also requires some hardware specification. Lumia 640xl has better hardware specification than Lumia 550/650.still call recorderis available to 550/650, why it not available in Lumia 640XL.
Lumia 640 hasn't better hw specifications than 650. Dont' let numbers fool you. New little SD212 overpassed old SD400 with half the battery and got more HW features inside, due to newer project and firmware updates (not more available on old SD platforms).
Don't forget the 650 real OLED screen
Lumia 640 is a great powerful phone but its development its completed. Maybe some 3rd party developer could take something more.
Newer chipsets and cpu/gpu got more features inside since fabric