How do I set up the TraceTogether App? 09 September 2020 12:07 Updated After set up is complete: Keep Bluetooth turned on, and keep your App open in the background until the end of the outbreak. Related articles How do I know that my App is working? Who can use the TraceTogether App? Which mobile phones are supported? How long should I keep the App running? Do I need to keep my phone's Bluetooth turned on all the time? What happens if I was in close contact with a COVID-19 case? How does the TraceTogether App work?