Check the router's LEDs and logs for evidence of where the fault lies. Note which LEDs light during power-up, SIM detection and network registration, and review any status messages in the router logs. Sharing the observed LED states and log entries with Comset helps distinguish provisioning or APN issues from hardware or coverage problems. Collect basic context (which carrier, model and firmware) and whether the issue follows the SIM or stays with the hardware to speed troubleshooting.
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What exact LED patterns or logs should I check first?
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Use this answer as a practical starting point. Current scope, specifications, compatibility, availability, pricing, timing and next steps should be confirmed directly with Comset where they affect a decision.
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