📞 Speakerphone: Go to Settings → Accessibility → Hearing → turn on "Always answer with speakerphone" so calls are always on speaker.
📱 Install the app: Open the device link in Chrome, tap the menu (⋮) and choose "Add to Home Screen." This creates a full-screen app icon.
🔆 Keep screen on: Go to Settings → Display → Screen Timeout → set to 10 minutes or more.
🔊 Volume: Turn media and call volume to maximum before handing the device to your loved one.