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There are other threads:
/t5/Xperia-Z1-Z1s/Z1-Yellow-Spot-Issue/td-p/902268/page/2
/t5/Xperia-Z1-Z1s/Xperia-Z1-s-display-turned-yellow-ish-colour/m-p/1028725#M44634
/t5/Xperia-Z1-Z1s/gt-gt-WORKING-WHITE-BALANCE-FOR-YELLOW-TINT-Z1/m-p/477533#M9502
