To attach SurfacePad to your phone, you remove the protective plastic sheet from the adhesive inside the back cover, line the sticker up, and press down. The adhesive is designed to be reused, so if you misalign SurfacePad or want to swap cases, you can remove it without an issue. Twelve South promotes thinness as one of the product’s key features, and the amount of bulk added is indeed pretty minimal. One advantage to this design: when the…