Since I know network engineers are geeks, and can't stop themselves from looking... On your iPhone (and android, and likely other cell phone OS), there are detailed diagnostics logs. On your iPhone, look under Settings->Privacy->Analytics->Analytics Data->awdd-<date ...> "awdd" means Apple Wireless Diagnostic Data. In my iOS awdd file for October 3,there was something like this: metriclogs { triggerTime: 1538590702067 triggerId: 524356 profileId: 174 commCenterGSMCellBroadcastEvent { timestamp: 1538590702066 message_id: 4370 message_code: 0 update_number: 0 emergency_user_alert: false } } The trigger time is local time in milliseconds. That means my phone got the cell broadcast at Wed Oct 03 2018 14:18:22, and displayed/alerted on the phone 1 millisecond later. Its usually a big file, so you'll need to scroll a long way. The entries are in triggerTime order, which is the date/time, will help narrow down where in the file. That is the diagnostic data about the WEA Presidential Alert cell broadcast message. The message_id 4370 is the GSM code for CMAS Alert type Presidential. An Amber alert is code 4379 and other codes exist for other messages. If you didn't get an alert, you can look in the diagnostic file around that time for other things which might have prevented receiving an alert, e.g. no receiption, voice call in progress, roaming on carrier without WEA, etc. In theory, Apple (iOS) and Alphabet (Android), and other manufacturers, which collect diagnostic data analytics on handsets could create a nationwide report how well WEA performed based on actual data instead of anedoctal reports.