If you're on iOS and in the affected area you should have received the alert.
If you're on Android you might need a device sold in the Japan market to get them (seems there are mixed reports on this, would love to hear from someone in the industry - does this stuff use standard GSM features and are these enabled on Android by default? could weird manufacturer skins disable them?).
You also need to be in the affected area to receive the message, although third party apps often let you customize the range or priority of messages to receive.
On my US-sold iPhone running on an MVNO I reliably receive earthquake/flood alerts. But I didn't receive the alert this morning since I live in the other end of the country where it was not broadcast.
Interesting, I assumed it was the carrier, but it might be the model. I have a Galaxy S7 which I got in Hong Kong. With this variant, I can't find the emergency alert settings anywhere. That might explain it.
Devices on MVNOs can still receive the alerts as long as they're set to receive. You'll have to dig around in the settings for it, but it should be on by default. If you got it through Yahoo though, probably no need to worry since you'd just get duplicates...
If you're on Android you might need a device sold in the Japan market to get them (seems there are mixed reports on this, would love to hear from someone in the industry - does this stuff use standard GSM features and are these enabled on Android by default? could weird manufacturer skins disable them?).
You also need to be in the affected area to receive the message, although third party apps often let you customize the range or priority of messages to receive.
On my US-sold iPhone running on an MVNO I reliably receive earthquake/flood alerts. But I didn't receive the alert this morning since I live in the other end of the country where it was not broadcast.