You have two voice assistants. Hey Meta controls the glasses. Hey Siri on iPhone, or Hey Google on Android, controls the phone. Both play through the glasses speakers.
Hey Meta commands. Hey Meta what do you see, describes surroundings. Hey Meta read this, reads text. Hey Meta what color is this, identifies colors. Hey Meta what is this, identifies objects. Hey Meta call and a name, makes a phone call. Hey Meta send a message to someone on WhatsApp, sends a message. Hey Meta play and a song or playlist, plays music. Hey Meta take a photo, takes a photo. Hey Meta battery, checks the battery level.
Siri commands on iPhone. Hey Siri navigate to an address, gives walking directions. Hey Siri what time is it. Hey Siri what's the weather. Hey Siri set a timer for 10 minutes. Hey Siri remind me to do something at a certain time. Hey Siri read my notifications.
Google commands on Android. Hey Google navigate to an address. Hey Google what time is it. Hey Google what's the weather. Hey Google set a timer. Hey Google remind me. Hey Google read my notifications.
The general rule is: Hey Meta for anything the glasses can see or do. Hey Siri or Hey Google for phone features like navigation, timers, and calendar.
Want to learn more about a specific command? Just ask. Say: Hey Meta, teach me about reading. Or: Hey Meta, teach me about navigation.