Help posterized! =(

[jarinkokari]

hi. i have a samsung galxy y and im happy with it...until recently i took a photo and was surprised to find that the photo looks posterized already, even without editing. i checked and reset my settings but everytime i use it, the image looks like it is posterized. i also tried to share the photo via bluetooth and still the image looked posterized. help!

 

[nekoshima]

i hope someone can address this because i, too have this dilemma.