Samsung GALAXY S7 Repair Manual page 19

STEP 3
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Next, put the back glass back on now if it's the original glass you might need to add a thin layer of
adhesive around the frame of the back glass. Outlined with the white shade of tape around the frame. If
it's a replacement back glass and doesn't come with adhesive on it definitely add some around the
frame. Then apply back glass to phone. Smooth around the back with your hands to help seal.
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Power on device and do post test.
Tools: Fingers