SIM alert
Public Warning

u.warn SIM Alert

The ultimate solution in increasing alert coverage, with zero integration effort.

u.warn SIM alert supports any device equipped with SIM/eSIM, also including smart watches and other wearables. The active alert is displayed on the screen of the device and each alert is associated with its own customized audio alarm.

The active alert is sent via Smart Geo fencing, enabling user to subscribe to alert notifications that happen in an additional area that is outside of the selected area.

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Key Benefits

Key Benefits


Zero integration with MNOs required

No need to integrate with the network, as the functionality is completely provided by a SIM Applet.


Unique audio alarm

SIM messages have a unique message notification, that is not used by messaging apps. This way the attention of the recipient is guaranteed.



The recipient of the message can take action directly from the notification. From calling a predefined number, sending a status message or requesting more information the activities can be configured.


OTA installation/update

The SIM Alert can be installed over the air on currently deployed SIM cards. Works for classic SIM cards as well as eSIM.



Cell locations can be used to target the messages to exactly the audience that needs to be warned.


Commercial use possible

Advertising based on users location is possible to get a return on the infrastructure cost of the public warning solution.

Product description

Product description

The alert is location-based and is shown in real time and the app can be factory burnt or downloaded OTA (Over The Air) to the existing user base.

An additional genius advantage of the u.warn SIM alert application is that communication is transmitted over data and therefore no integration with the MNOs (Mobile Network Operators) is required. Once the alert has been issued, user is aided with additional tool of interactive help options for SOS call from their device.

Whilst u.warn SIM alert is developed for mass communication of emergency alert messages, it also provides a powerful tool for additional commercial and marketing purposes.

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We look forward to answering your questions.

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