I’m now in UAE which is affected by war. Woke up to an alert yesterday night and was wondering how this works. Any good write ups on its technical side?
david_allison10 hours ago
Might as well start with the source code[0] and dig deeper:
* CMAS https://en.wikipedia.org/wiki/Wireless_Emergency_Alerts
* ETWS Earthquake and Tsunami Warning System
[0] https://cs.android.com/android/platform/superproject/main/+/...
WarOnPrivacy20 hours ago
Delivery Method: WEA utilizes a one-to-many alert delivery service
called SMS-Cell Broadcast (SMS-CB), rather than SMS Point-to-Point
(SMS-PP).
SMS-Cell Broadcast (SMS-CB) is a method for sending short text messages
simultaneously to multiple mobile phone users within a specific geographic
area. It is a feature within the GSM (Global System for Mobile
Communications) standard and is sometimes referred to as Cell Broadcast.
rishikeshsop19 hours ago
Is this a universal standard? How does it override my phone’s volume!
Jeremy102613 hours ago
Typically there are laws dictating how emergency alerts have to be delivered, and your phone's OS will follow that. So "it" doesn't override your phone's volume. Your phone's OS will override it's volume when it receives the alert.