however the GPL contains an implicit acceptance clause:
Since Samsung has modified and distributed the derivative work (in binary form), according to the GPL they have already indicated their acceptance of the GPL. If that is not the case, they need to explicitly say that they haven't accepted the GPL, but then they are liable to large fines and several years jail for criminal copyright infringement.
5. You are not required to accept this License, since you have not signed it. However, nothing else grants you permission to modify or distribute the Program or its derivative works. These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it.