Use SIMs from carriers that have independently tested coverage at the site. Different carriers may use different towers or backhaul, so a dual-SIM router can switch when one network fails. At very critical sites, separate antennas or even separate routers and power paths may be justified.
Carrier diversity does not protect against a shared local power failure, damaged antenna or common configuration error. Test both paths and monitor them while they are on standby. The design should reflect the cost of losing access and the practical options in that remote area.
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How can carrier diversity reduce the risk of losing access to a critical remote installation?
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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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