Designed primarily with the screen protectors these screen protectors for the Samsung Galaxy S23 FE in mind. https://www.amazon.co.uk/gp/product/B0CGPPCLNN/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

It feels weird that they didn't come with an alignment tool. So here you go. It may be compatible with other similar screen protectors, and for other Samsung Galaxy 6.4" phones. This is however, untested.