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Help Stuck/Dead pixels

Hello. Can anny1 please tell me if there are software problems that can make stuck pixels appear or disappear at random? I had for a month and a half one stuck pixel ( it was visible in light colours, but not in dark ones ) and i just niticed the last couple of days that it dissapeard ... Can anntone tell me the difference betwen dead and stuck pixels? And not last, sometimes, after I clean my phone screen with a cloth or something, a pink vertical line shows up on the middle right of my screen. The interesting part about this line is that it passes right through the stuck pixel. Thanks in advance

P.S.: I own an internation version of the SGS 2
 

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