Both physical SIM cards and eSIMs securely connect you with your network and give you access to your service so you can use your plan. A physical SIM card is a small chip that is physically inserted into your phone. An eSIM is a digital chip that can be downloaded to your phone. If you have an eSIM-compatible device, this will give you the quickest way to start using your plan. Otherwise, you can purchase a physical SIM kit in one of our retailer partners’ stores.