Question about Garmin Forerunner 265

The watch does not support a physical SIM card to make direct calls or text messages. However, it does offer smart notifications that allow you to receive notifications from your smartphone. As for the app store, there is no native app platform like on smartphones, but you can install some apps specifically designed for Garmin devices via the Garmin Connect app. Strava, for example, is available via the Garmin Connect app.