I need some advice on how to glue the magnetic ring holder to a Samsung S20. The Samsung S20 is made of glass. The instruction is not 100% clear to me. Is says The sticker must be used when attaching the magnetic ring holder to a phone made of glass. However, what sticker does it refer to. The packet contains 2 3m transparent glue sticker and 1 black sticker. Am I supposed to use both the clear one and the black one? Thanks in advance
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