If you have an iPhone and you want to put a sim card in it, there are a few things you can do. First, make sure that your iPhone is turned on and connected to the network. If it isn’t, turn it on and connect it to the network. Next, open up your Settings app and go to the General section. Under “Network,” make sure that “SIM Card” is checked in the list of options. Now, go into your phone’s SIM card tray and insert your sim card. If everything goes according to plan, your iPhone should start up with the new sim card in place!