Megapixel is like megabite. Megabite has 1 000 000 bytes so megapixel has 1000 000 pixels. Mega refers to 10^6
This all depends on the camera of the phone in question. Some 'phones have no camera.
they are two completely different things
Roughly 10,000,000 pixels.
You simply have to multiply it and then divide by 1000. Its like the 2 million pixels from Sony LCD Bravia. Its some multiplication that reaches the 2 million mark to give that unmatched picture...