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That depends on the router’s failover rules and on how failure is detected. Some systems swap because the mobile connection drops outright. Others watch whether traffic can still reach a known destination, which is often more useful because a link can stay technically connected while being practically unusable. The transition may be quick, but the real question is whether the application can tolerate a short interruption while the router re-registers and r…
Dual SIM and Carrier Redundancy · 2026-07-16 Should I use two different carriers in a dual-SIM router, or can both SIMs be on the same network?Two different carriers usually provide the best redundancy, because the whole point of dual SIM is to reduce the chance that one carrier outage, congestion problem or coverage gap takes the site offline. Using two SIMs on the same network can still help with plan management or swap-over behaviour, but it does not give the same independence. Comset will normally ask which carriers work best on the site, whether the router is fixed or mobile, and how critic…
Dual SIM and Carrier Redundancy · 2026-05-26 Can two SIM cards on the same carrier provide meaningful redundancy?Two SIMs on the same carrier can protect against a damaged SIM, an account problem or a plan-specific issue, but they usually share much of the same tower and core network infrastructure. That means they provide less geographical and network diversity than SIMs from different carriers. Same-carrier dual SIM can still be useful where one service has a different APN, billing arrangement or priority, or where operational simplicity matters. For stronger redu…
Test both SIMs independently first. Confirm that each registers, receives the expected APN, passes traffic and can reach the services the site actually uses. Record signal-quality readings and data performance at the installed antenna position, not only on a workbench. Then simulate failures: block the health-check target, remove the primary WAN, disable mobile data, create a weak-signal condition if practical and verify the router changes paths within th…
Dual SIM and Carrier Redundancy · 2026-05-25 Does a dual-SIM router automatically provide reliable failover, or does the switching behaviour still need to be configured?No. Dual SIM gives the router two services to choose from, but reliable failover depends on how the router tests the active connection and when it is told to switch. A SIM can remain registered to a tower while internet access is unusable, so checking only registration or signal strength may not detect a real outage. The configuration should define health-check targets, failure thresholds, retry timing, preferred SIM, data limits and the conditions for re…
