Learn how to send VoIP push notifications with OneSignal on both Android and iOS, including setup requirements, best practices, and testing tips.
Activity
or present custom UI.
If you want to launch a native UI (e.g., incoming call screen), use Android’s NotificationExtenderService
to override the notification behavior.
For further guidance:
Add PushKit to your app
Create a new OneSignal app for VoIP users
p12 in Keychain Access
VoIP certificate screenshot
Register device with VoIP token
"test_type": 1
property. Omitting this can cause "Mismatched Subscription Environment"
errors or notification failures.Send VoIP notifications
"apns_push_type_override": "voip"
app_id
of your VoIP appDo confirmed deliveries work with VoIP?