Check the obvious things in order: is the SIM active, seated correctly and unlocked if required; is the APN correct; does the router support the carrier bands you need; and is the antenna arrangement sensible? A phone test proves that the service exists, but it does not prove that the router is configured correctly or that the site is suitable for the router’s antenna arrangement.
Comset support is most effective when the customer can say what the router LEDs or logs show, which carrier is being used and whether the issue follows the SIM or stays with the hardware. That quickly separates a setup issue from a compatibility or coverage issue.
Public Q&A
If the SIM works in a phone but not in the router, what 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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