Starting March 27, 2025, we recommend using android-latest-release instead of aosp-main to build and contribute to AOSP. For more information, see Changes to AOSP.
Call notifications
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Android 7.0 moves functionality related to call notifications from the
Telecom system service in the Android platform to the Dialer app.
Previously, the responsibility for displaying call-related notifications was
split between Telecom and the default Dialer app, creating inconsistencies in
behavior. In Android 7.0, the Dialer assumes all responsibility for handling
call notifications.
Behavior in Android 6.x and lower
In earlier Android releases, Telecom and Dialer split responsibilities as
described below:
| Functionality |
Done by Telecom |
Done by Dialer |
| Incoming call notification |
Yes (ringing, vibrate) |
Yes (notification display, caller ID) |
| Send to voicemail |
Yes |
No |
| Custom ringtone |
Yes |
No |
| Missed call notifications |
Yes |
No |
| Message Waiting Indicator (call voicemail) |
Yes (telephony) |
No |
| Visual voicemail notifications |
No |
Yes |
Examples of inconsistent behavior caused by this responsibility split
included:
- Telecom was responsible for starting the ringer/vibrator, but the dialer was
responsible for displaying the incoming call notification. If the dialer is slow
to startup, this can result in ringing starting several seconds before the
incoming call notification is displayed.
- Telecom was responsible for displaying missed call notifications. As
proprietary features (such as Google caller ID) do not work on these
notifications, this could result in inconsistencies between Telecom
notifications and Dialer UI (such as the call log).
Behavior in Android 7.0 and higher
The Android Open Source Project (AOSP) Dialer implements the new
functionality. For details, refer to the following documentation:
Notification style for calls in Android 12 or higher
For devices running Android 12 or higher, to provide
a consistent user experience for calls, we recommend that apps use the
CallStyle notification style for incoming and ongoing calls.
For more information, see
New phone call notifications allowing for ranking importance of incoming
calls.
Implementation
Device implementers may need to update Telecom/Telephony components that
expose APIs available for use by the default Dialer.
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Last updated 2025-08-29 UTC.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-29 UTC."],[],[],null,["# Call notifications\n\nAndroid 7.0 moves functionality related to call notifications from the\nTelecom system service in the Android platform to the Dialer app.\nPreviously, the responsibility for displaying call-related notifications was\nsplit between Telecom and the default Dialer app, creating inconsistencies in\nbehavior. In Android 7.0, the Dialer assumes all responsibility for handling\ncall notifications.\n\nBehavior in Android 6.x and lower\n---------------------------------\n\nIn earlier Android releases, Telecom and Dialer split responsibilities as\ndescribed below:\n\n| Functionality | Done by Telecom | Done by Dialer |\n|--------------------------------------------|------------------------|---------------------------------------|\n| Incoming call notification | Yes (ringing, vibrate) | Yes (notification display, caller ID) |\n| Send to voicemail | Yes | No |\n| Custom ringtone | Yes | No |\n| Missed call notifications | Yes | No |\n| Message Waiting Indicator (call voicemail) | Yes (telephony) | No |\n| Visual voicemail notifications | No | Yes |\n\nExamples of inconsistent behavior caused by this responsibility split\nincluded:\n\n- Telecom was responsible for starting the ringer/vibrator, but the dialer was responsible for displaying the incoming call notification. If the dialer is slow to startup, this can result in ringing starting several seconds before the incoming call notification is displayed.\n- Telecom was responsible for displaying missed call notifications. As proprietary features (such as Google caller ID) do not work on these notifications, this could result in inconsistencies between Telecom notifications and Dialer UI (such as the call log).\n\nBehavior in Android 7.0 and higher\n----------------------------------\n\nThe Android Open Source Project (AOSP) Dialer implements the new\nfunctionality. For details, refer to the following documentation:\n\n- Missed call notifications \n [Telecom/src/com/android/server/telecom/ui/MissedCallNotifierImpl.java](https://android.googlesource.com/platform/packages/services/Telecomm/+/android16-release/src/com/android/server/telecom/ui/MissedCallNotifierImpl.java) \n [Dialer/android/dialer/calllog/MissedCallNotificationReceiver.java](https://android.googlesource.com/platform/packages/apps/Dialer/+/android16-release/java/com/android/dialer/app/calllog/MissedCallNotificationReceiver.java) \n [Dialer/android/dialer/calllog/MissedCallNotifier.java](https://android.googlesource.com/platform/packages/apps/Dialer/+/android16-release/java/com/android/dialer/app/calllog/MissedCallNotifier.java)\n- Playing ringtones: \n [frameworks/base/telecomm/java/android/telecom/InCallService.java](https://android.googlesource.com/platform/frameworks/base/+/android16-release/telecomm/java/android/telecom/InCallService.java) \n [Telecom/src/com/android/server/telecom/InCallController.java](https://android.googlesource.com/platform/packages/services/Telecomm/+/android16-release/src/com/android/server/telecom/InCallController.java) \n [Dialer/java/com/android/incallui/ringtone/](https://android.googlesource.com/platform/packages/apps/Dialer/+/android16-release/java/com/android/incallui/ringtone/) \n [Dialer/java/com/android/incallui/StatusBarNotifier.java](https://android.googlesource.com/platform/packages/apps/Dialer/+/android16-release/java/com/android/incallui/StatusBarNotifier.java)\n- VVM notifications \n [frameworks/base/telephony/java/android/telephony/TelephonyManager.java](https://android.googlesource.com/platform/frameworks/base/+/android16-release/telephony/java/android/telephony/TelephonyManager.java) \n [Telephony/src/com/android/phone/PhoneInterfaceManager.java](https://android.googlesource.com/platform/packages/services/Telephony/+/android16-release/src/com/android/phone/PhoneInterfaceManager.java) \n [Dialer/src/com/android/dialer/calllog/DefaultVoicemailNotifier.java](https://android.googlesource.com/platform/packages/apps/Dialer/+/nougat-release/src/com/android/dialer/calllog/DefaultVoicemailNotifier.java)\n\nNotification style for calls in Android 12 or higher\n----------------------------------------------------\n\nFor devices running Android 12 or higher, to provide\na consistent user experience for calls, we recommend that apps use the\n[`CallStyle`](https://developer.android.com/reference/android/app/Notification.CallStyle) notification style for incoming and ongoing calls.\nFor more information, see\n[New phone call notifications allowing for ranking importance of incoming\ncalls](https://developer.android.com/about/versions/12/features#new-calls).\n\nImplementation\n--------------\n\nDevice implementers may need to update Telecom/Telephony components that\nexpose APIs available for use by the default Dialer."]]
