Then, simply replace the old SIM card with the new one.
If you have an iOS device, you’ll have to open the tiny tray on the side of the phone. If you have an Android device, this means you need to remove the back panel of your phone in order to access it.
To install your SIM, you’ll first have to remove your current one. If it is, you can go ahead and pick up a Straight Talk Keep Your Own Phone Kit. Not sure if yours is compatible or not? You can check it online. It needs to either be a compatible AT&T device or an unlocked GSM device. The first step is to make sure your phone is compatible with Straight Talk. But don’t worry – it’s a quick and easy process. However, if you decided to keep your current phone, you have to purchase a SIM card and install it before you can activate your device. If you purchased a Straight Talk phone, it already comes with the SIM you need. So, you’ve signed up for Straight Talk and are ready to activate your cell phone. The beginner's guide to Straight Talk SIM cards.