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Does the S!RENEN phone warning need internet, and does it track your phone?

How S!RENEN reaches your phone.

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Short answer

No to both. S!RENEN uses a technology called cell broadcast, which sends the warning through phone masts to a specific area, so it works without an internet connection. The signal goes one way only, so the authorities receive no data about the phones that get the warning or about where they are. S!RENEN is not an app, and it adds to the other warning systems rather than replacing them.

Practical info

Why

  1. No internet connection is needed.
  2. Only phones in the danger area get the warning.
  3. No personal data is collected.

Details

Deaf and hard-of-hearing people can sign up through Digital Post for an SMS service with warnings about all alerts in the whole country.

Tip

Keep your phone software updated, since S!RENEN needs at least iOS 16.4 or Android 11 in 2026.

What may differ

S!RENEN supplements the other warning systems, so the sirens and other channels are still used.

Common misconception

An emergency warning on your phone means the authorities know where you are.

What actually happens

Cell broadcast is one-way, so no data about your phone or location is sent back.

People also ask

  • Will I get S!RENEN warnings on a foreign phone?
  • Which phones can receive S!RENEN?
  • Do I need an app for emergency warnings in Denmark?

Sources

This answer is for reference only. Prices and terms of mobile plans are set by each operator, so check them with your own operator.

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