On the Galaxy S7 Gold, the vital function of holding the SIM card in place is done by this SIM Card Tray. The card connects you to your preferred mobile network so that you can call and text other people. This delicate part can break during removal or installation easily though. You wona?t be able to seat a SIM card properly when it is broken so your next best option is to purchase a brand new replacement tray such as this. It Installs in the same way as your other SIM card tray.