I have a 540x960 sony xperia m2 and my iPhone has 640x960. The confusing part is that the iPhone can play in hd while the m2 can't. I can still play hd on my m2 on 3rd party apps like viral pro ( youtube won't let me play hd but viral can). So tell me, what is the difference of these resolutions?
Read more: What is the difference of 540x960 and 640x960?