Connectivity you can trust for lone worker devices
Built for devices that can't afford to go offline
Lone worker badges, personal alarms and geofenced safety units are only as good as their connection. A Com4 SIM can use several mobile networks in each country, so a device that loses one network can move to another. Alarms, positions and status updates reach your monitoring platform or alarm receiving centre as data.
Lone worker devices are one part of connected safety. For CCTV, access control and alarms, see IoT connectivity for security.
Data-based alarm transmission
Com4 supports data-based alarm transmission for lone worker devices. Alarm events, GPS positions, check-ins, no-movement alerts and battery status are sent over LTE-M, NB-IoT, 4G or 5G to your platform.
- SIMs ship pre-activated, ready for production and deployment
- Access to multiple networks per country for higher availability
- Private APN and secure routing straight to your platform
- Every SIM visible and controllable in Polaris, our connectivity management platform
- Physical SIM or eSIM, to suit your device design
Com4 can help you build reliable lone worker solutions
Resilient coverage
Multi-network SIMs reduce the risk of a device being stuck on one weak or failing network, indoors, outdoors and in remote areas.
Alarms delivered as data
Alarm events travel as data messages over LTE-M, NB-IoT, 4G or 5G, with low power use that keeps devices running longer between charges.
Location and geofencing
Send position updates and geofence events so the monitoring team always knows where help is needed.
Central management
See status, data usage and connection history for every device in Polaris, and act on issues before a worker is affected.
Secure by design
Private APN and encrypted connections keep personal safety data away from the public internet.
Discover the Power of IoT with Com4’s Exclusive Free Test Kit

Ready to revolutionize your IoT journey? Com4 invites you to experience the future with our Free IoT Test Kit – a gateway to seamless connectivity and unparalleled possibilities.
The Free IoT Test Kit includes:
- Up to 5 SIM cards per applicant
- 100 MB of data per SIM per month, usable within the EU
- A 60-day validity period
- Possibility to include eSIM form factor
- Support for multiple technologies, including 2G/3G/4G/5G, LTE-M, and NB-IoT, all within a single SIM
Global cellular connectivity for lone worker devices
Build one device for every market. Part of Wireless Logic, Com4 brings 15 years of IoT experience, 1000+ customers and 20M+ connections across the group.
We are your true partner for IoT connectivity.
Building or upgrading a lone worker device? Our IoT specialists help you choose the right network technologies, test your device and get it to market.