Every time I've installed them I've done it very carefully and I just couldn't lay the glass flat resulting in a 1/16th Inch Dos led does not stick at all. It mostly happened in the corners. It really irritated me. I've installed hundreds of protectors (I make them for work too) and I think the installation process is simple enough, but the end result is pretty terrible. I wouldn't recommend them for s21+ and wouldn't buy them again.
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