- Download PIE by Bagel Labs app from Google Play or Apple App Store (search for 'Bagel Labs').
- Turn on Bluetooth on your smartphone.
- Run PIE app.
- Select 'Device' tab and choose 'PIE' among connectable device lists.
- PIE will now display 'BT' inidicating that pairing is complete.
(PIE runs on advertising mode searching for Bluetooth signal all the time.)