My S20U has never been dropped and lives in a rugged armor case as well the whole time, I took it out the case today to clean and noticed there was some bubbling under the rear case by the corner, is this the glue that has come undone a little? Is there a way I can sort this out as I am looking to part exchange it and need to remove this issue.
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I took it to the samsung service center and they said they will replace the back cover for free as long as there's no physical or water damage on inspection so that's good, it appears it's the glue under the back cover that has come loose somehow.
I wonder if I could just fix this myself with a hairdryer