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How will I know that Mobile Crash Response has been activated if I’ve been involved in a crash?

When a crash is detected, you will receive an automatic OnStar Guardian app notification on your smartphone. For Android devices, the notification will read: Connecting to an OnStar Emergency Advisor. A crash has been detected. For Apple devices, the notification will read: Crash detected. OnStar Emergency has been alerted. Additionally, on Android devices, you will hear an audible prompt notifying you that you are being automatically connected to an OnStar Emergency-Certified Advisor. On Apple devices, you will receive a call from the OnStar Advisor that you must answer.