I know that my tablet is hacked into because the hacker told me so and the hacker told me that it (using it to keep it anonymous) created these horizontal lines and streaks on my tablet display.
Duplicate posts are not allowed and you already have at least one other post going on this subject. You may have been hacked, but I don't see a hacker as being able to create horizontal lines on your screen. Attach a screen shot, please. To get rid of a hacker, go to an uncompromised device and change your passwords to your Samsung, Google and email accounts and then factory reset your phone and start from scratch. If your lines are still there you have a bad screen. You can try booting into safe mode, which will only allow native Samsung apps to run. If you have no lines on your screen, then perhaps your hacker was able to do something.
You seem to indicate that you are OK with having the hacker, just not OK with having the lines.
