I have an iPhone 12 mini and that's what I am using for the of a phone and I like it but I noticed that it did have a tempered glass cover on it that was cracked probably because of me. But in any case I wanted to replace a cracked tempered glass cover so I bought this product and it was pretty easy to use. I would say what you want to use is a very thin knife if you have an X-Acto knife, that would be great and you can dislodge the old cover by watching either the YouTube videos on how to do it or you can just dislodge it the glue from the top and then put on the new one. It's pretty easy and straightforward. If you were just put it on the tempered glass cover for the first time, it seems pretty straightforward. If you were just putting on a tempered glass for the first time onto a brand new phone, then I would say that all you do is take off all the protection on the new glass that you've gotten in this product box and clean the phones surface is pretty thoroughly. This product gives you all the cleaning stuff for that. I would say the only nerve-racking part is putting that tempered glass down and making sure that you square it up and it's OK and then get the air out which worked out pretty well for me.