Try lightly pressing on the screen,
An iPhone 5 pixels is 640 x 1136 pixels or about 326 ppi (pixels per square inch). That is 727,040 pixels.
320 pixels x 480, at 163 ppi iPhone 4 has 960x640 at 326 ppi
this website might help http://sourceforge.net/projects/stucksweep/files/Stuck%20Pixel%20Sweeper/1.0%20RC1/stucksweep.jar/downloadWARNING: MAY CAUSE SEIZURES
320 by 480 pixels
iPhone 2G = 2MPX iPhone 3G = 2MPX iPhone 3GS = 3MPX iPhone 4 = 5MPX
2 mega pixels
480 by 320 pixels at 163 ppi
You can't
No you cant because that is one thing you can not erase
LOL perve
The iPhone 4 camera has 5 megapixels.Egg Mc.Man.....In a Plastic Bag
just gently rub the area around the white spots few times. sometimes it will worsen the whiteness because it is caused by the bad pixels stuck on the spot, but most of the times it will get fixed by pressing gently.