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On my Android I've turned off everything in the emergency alerts section but they still go through. I think that you aren't able to disable presidential alerts

On my Android I've turned off everything in the emergency alerts section but they still go through. I think that you aren't able to disable presidential alerts on Android, which happens to be the only alert level Ontario uses.

shpx 7y ago
Looking at the Android source code, it looks like you're right: > Presidential alert is default on and cannot be turned off. https://cs.android.com/android/_/android/platform/packages/apps/CellBroadcastReceiver/+/70b77474601a12e44692ef0af246027f84b8d08c:res/values/overlayable.xml;l=42 https://cs.android.com/android/_/android/platform/packages/a... > CMAS Presidential must be always on (See 3GPP TS 22.268 Section 6.2) regardless [of the] user's preference https://cs.android.com/android/_/android/platform/packages/apps/CellBroadcastReceiver/+/70b77474601a12e44692ef0af246027f84b8d08c:src/com/android/cellbroadcastreceiver/CellBroadcastConfigService.java;l=118 https://cs.android.com/android/_/android/platform/packages/a... > A CMAS-capable User Interface (UI) shall support the ability for the user to opt-out of only the Imminent Threat and Child Abduction Emergency Warning Notifications. When a Presidential Warning Notification is received, it is always presented to the user whenever Cell Broadcast Service via GSM/UMTS or warning message delivery via E-UTRAN is enabled on the UE. https://www.etsi.org/deliver/etsi_ts/122200_122299/122268/10.02.00_60/ts_122268v100200p.pdf https://www.etsi.org/deliver/etsi_ts/122200_122299/122268/10... Seems like no one working in the Canadian government has heard about The Boy Who Cried Wolf.
ghaff 7y ago
That may be true on the iPhone in the US as well. Apple support doesn't say anything about it AFAIK but I did find an article suggesting you can't turn Presidential alerts off. (Though I don't think I've ever seen one.)
- ComputerGuru 7y ago
  There was a test message sent last year when the system was first implemented. It has significant news coverage at the time (most of it along the lines of “Trump wants to send notifications you can’t block to your phone”) but it was definitely heavily featured that they aren’t blockable.

shpx 7y ago

Looking at the Android source code, it looks like you're right: > Presidential alert is default on and cannot be turned off. https://cs.android.com/android/_/android/platform/packages/apps/CellBroadcastReceiver/+/70b77474601a12e44692ef0af246027f84b8d08c:res/values/overlayable.xml;l=42 https://cs.android.com/android/_/android/platform/packages/a... > CMAS Presidential must be always on (See 3GPP TS 22.268 Section 6.2) regardless [of the] user's preference https://cs.android.com/android/_/android/platform/packages/apps/CellBroadcastReceiver/+/70b77474601a12e44692ef0af246027f84b8d08c:src/com/android/cellbroadcastreceiver/CellBroadcastConfigService.java;l=118 https://cs.android.com/android/_/android/platform/packages/a... > A CMAS-capable User Interface (UI) shall support the ability for the user to opt-out of only the Imminent Threat and Child Abduction Emergency Warning Notifications. When a Presidential Warning Notification is received, it is always presented to the user whenever Cell Broadcast Service via GSM/UMTS or warning message delivery via E-UTRAN is enabled on the UE. https://www.etsi.org/deliver/etsi_ts/122200_122299/122268/10.02.00_60/ts_122268v100200p.pdf https://www.etsi.org/deliver/etsi_ts/122200_122299/122268/10... Seems like no one working in the Canadian government has heard about The Boy Who Cried Wolf.

ghaff 7y ago

That may be true on the iPhone in the US as well. Apple support doesn't say anything about it AFAIK but I did find an article suggesting you can't turn Presidential alerts off. (Though I don't think I've ever seen one.)

ComputerGuru 7y ago
There was a test message sent last year when the system was first implemented. It has significant news coverage at the time (most of it along the lines of “Trump wants to send notifications you can’t block to your phone”) but it was definitely heavily featured that they aren’t blockable.