Set up a regular test plan that includes controlled failover by disconnecting the primary WAN and verifying critical services stay reachable, VPN paths stay secure, and remote management remains available via mobile. Ensure the backup SIM is active, has data, and uses the correct APN. If you use any external antennas, verify their viability during the test. Document results and assign ownership so the team knows what to expect. Automated or scheduled tests help catch issues like expired SIMs or misconfigured policies before a real outage.
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How often should I test cellular backup to prove it will work in an outage?
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