09-23-2015 11:13 AM
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  1. djolew's Avatar
    djolew
    On the phone the Samsung Galaxy Core me from time to time appears black display and writes
    7s onkey press
    Please if you can explain to me what to do to prevent this from happening.
    Thanks in advance
    12-13-2014 01:06 PM
  2. B. Diddy's Avatar
    B. Diddy
    Senior Ambassador
    Welcome to Android Central! Does it seem to be associated with any particular app or action? Does it only appear briefly, or does it freeze that way? Are you rooted or unrooted? Have you tried a factory reset?
    12-14-2014 12:41 AM
  3. rebroad's Avatar
    rebroad
    You (or someone else) probably recently enabled some sort of debugging using the various *# codes on the dialpad. You can disable these in the same way as you enabled them. The key code is probably *#9900#
    09-23-2015 11:13 AM
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