# am > Android activity manager. > More information: . - Start a specific activity: `am start -n {{com.android.settings/.Settings}}` - Start an activity and pass [d]ata to it: `am start -a {{android.intent.action.VIEW}} -d {{tel:123}}` - Start an activity matching a specific action and [c]ategory: `am start -a {{android.intent.action.MAIN}} -c {{android.intent.category.HOME}}` - Convert an intent to a URI: `am to-uri -a {{android.intent.action.VIEW}} -d {{tel:123}}`