I have this Samsung mobile GTI-9300 which has started to display a green flashing light. The light which emanites from the top left side of the device flashes continuously about every second. This may not be related but I also note that sometimes when I retire at night with the battery around 90%, it is flat next morning. On other times, the battery is around 50 - 60%. As far as I know I haven't left anything on overnight to explain this. I would like to hear any comments on this problem.

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