Please ensure that the notifications settings for Tango have been enabled on your Apple device. To enable notifications:
- Tap on the Settings app
- Tap on Notifications
- Tap on Tango
- Enable Allow Notifications
- Make sure 'Alert Style When Unlocked' is set to Banners or Alerts
You can also set your preferences for Show in Notification Center, Sounds, Badge App Icon, and Show on Lock Screen.