- Open the invite link in your phone's main browser: Safari on iPhone, Chrome on Android.
- Allow camera and microphone when asked.
- Prop the phone up at eye level, so your hands are free and the picture stays still.
- Turn on Do Not Disturb, so a call doesn't interrupt a recording.
- Use Wi-Fi if you can, and keep the battery above 30%.

Start and finish on the same device. Your progress is saved in that browser, so switching to a laptop halfway may start you again from the first question.