MetroPCS SIM cards are available on the MetroPCS website, at MetroPCS stores, authorized dealers or participating Walmart stores. To purchase SIM cards online, navigate to the MetroPCS website, and click Shop Products. Once there, click the Shop All Phones button, and scroll down to order MetroPCS SIM card.
Use the Store Locator feature on the MetroPCS website to find a store that sells MetroPCS SIM cards. Navigate to the MetroPCS website, and click Store Locator at the top of the page. Enter an address or ZIP code in the search text box, and click the Go button. Mark the store type boxes to filter the search results by store type.