Nothing. The mic hole makes a 90º turn to the mic. Samsung purposely made it that way for this exact reason. And don’t blame Samsung for not watching what you were doing, or reading the instructions. You can clearly see two pin holes, and if you look, you can also see the outline of the sim tray. And if you look in the quick start manual, you can clearly see which hole to punch.
I guess we all have the choice. Better water resistance and more difficult screen repair, or no water resistance and easier screen repair. How does one expect water resistance without the thing being sealed?
To Samsung’s credit, the batteries seem robust. After all, Samsung is a top quality lithium ion battery manufacturer. I bought the S6 when they first came out, and my Son has it now. It still works perfect and the battery is still in very good shape after 4 years of heavy usage. Can’t say the same for my Wife & Daughter’s iPhone 6.