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OS warning

Discussion in 'Android Questions' started by Android Question, Oct 2, 2013.

  1. Android Question

    Thread Starter

    I have a Samsung galaxy s4 and on opening my cover it is displaying a warning saying a custom OS can cause critical problems in phone and installed applications ? not sure how this has got here as phone was nearly out of charge and I don't know how to remove it as when I press the volume down key like it says nothing is happening


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