Industrial and OEM connectivity
Industrial M2M & IoT SIM Cards
Connect controllers, gateways, sensors and embedded products with cellular infrastructure that can be automated, observed and secured at fleet scale.
In brief
An industrial M2M SIM provides managed machine-to-machine connectivity for unattended devices. The SIM and management platform should align with the product's modem, protocols, cloud endpoints, addressing, security controls, deployment countries and full lifecycle from factory test to decommissioning.
What you can connect
- Industrial gateways and PLC telemetry
- OEM connected products
- Remote plant and environmental sensors
- Kiosks, cabinets and infrastructure controllers
Connectivity is only one part of reliability
A global country count does not prove the required network or radio technology is available at a site.
Public internet exposure and broad outbound access increase the attack surface.
Changing APNs, certificates or firmware after deployment can be expensive without remote controls and staged updates.
Technical planning
Design the complete connection
Architecture
The industrial endpoint should initiate encrypted MQTT or HTTPS traffic to a defined backend, with APN, DNS, IPv4 or IPv6, private routing and inbound access chosen deliberately. Factory activation, credentials, OTA updates, audit records, support access and secure retirement belong to one lifecycle design.
Data and power sizing
Profile normal telemetry, alarms, logs, remote shell or support sessions and firmware independently. Include protocol keepalives, TLS handshakes and reconnect storms. Use fleet groups for different products or firmware branches so one policy or limit does not create a common-mode outage.
Solution design
What we qualify before recommending a SIM
Coverage maps and headline data allowances are a starting point. A production design needs the device, traffic, locations and operating model.
- Module certification, bands, SIM format and environmental needs
- APN, DNS, IPv4/IPv6 and inbound-access design
- MQTT/HTTPS endpoints, ports and traffic policy
- Data profile including logs and OTA firmware
- API, webhook, role and audit requirements
- Factory activation, field support and secure retirement
Multi-provider by design
Choose Onomondo, Telnyx or another fit
Onomondo can suit OEMs needing one core, non-steered network choice, cloud connectors and deep packet/network diagnostics. Telnyx can suit API-first products needing group traffic policies, detailed records, public/static addressing or private routing. A provider may be selected per product or geography rather than forced across every workload.
Onomondo suits OEMs that value a single core, non-steered access, cloud connectors and packet-level diagnostics. Telnyx suits API-first products needing group traffic policies, detailed records, public/static addressing or private routing. Private gateway region, latency and data sovereignty requirements need explicit architecture review.
Availability note: networks, radio technologies, IP features, regions and platform controls vary by provider, country and plan. We verify the proposed configuration during the pilot.
Primary product sources reviewed 26 July 2026:
What the pilot should prove
- Validate every module, firmware branch, band and SIM format.
- Restrict endpoints and confirm DNS, certificates and time synchronisation.
- Run OTA update, failed update and rollback scenarios.
- Test activation, support access, audit trail and secure decommissioning.
Discover
Confirm devices, sites, traffic, security, support and commercial constraints.
Pilot
Test representative hardware and locations, then measure attachment, usage and recovery.
Scale
Document the approved profile, alerts, ownership and rollout or rollback process.
Frequently asked questions
What does M2M mean?
Machine-to-machine describes devices exchanging data with other systems without routine human operation. It is a practical subset of the broader Internet of Things.
Can iSIM provide private APN or VPN connectivity?
Provider options may include private routing, VPNs or controlled gateways. Architecture, region, addressing and endpoint requirements must be confirmed.
Do you support eSIM and embedded MFF2 hardware?
Potentially, alongside removable SIM formats. Device hardware, order volume, profile model and provider support determine the right form factor.
Can SIM management be integrated into our platform?
Both candidate provider stacks expose APIs; available operations include lifecycle and usage functions, with provider-specific policies, logs and webhooks.
How should we migrate an installed fleet?
Run the new service in a representative subset, compare coverage and operations, document rollback, then migrate in controlled batches aligned with physical service visits where needed.
Prove the connection before you scale it.
Tell us what you are connecting, where it operates and what must happen when coverage changes. We will shape a representative iSIM pilot.