Samsung SM-G981B Repair Manual page 48

4
After additionally heating the heating bag, apply it on the bottom edge of the back
cover for 3 minutes.
5
Place the suction cup in the center of the bottom edge of the back cover, lift upwards
while separating it with the opening pick.
If you have trouble creating a gap, heat the microwaveable heating bag
additionally, and apply it on the back cover to further soften the adhesive. When
reheating, it should be heated no longer than 30 seconds.
Disassembly and Assembly
48