The trip notebook / Manual terms check

Is your backup really a different path?

Audit two connections for shared visited networks, devices, routers and power. Keep unknown room coverage and permissions separate from resilience claims.

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Follow both paths to the places they meet.

PrimaryDevice → access network

BackupDevice → access network

Shared device? Router? Power? Upstream?

Name the visited network, not the retailer.
Trace device, router and power dependencies for both paths.
Test a real switch in the room; keep unknowns visible.

Primary / Actual connection path

Primary labelPrimary visited networkNot the shop or eSIM retailer. Wi-Fi does not identify its upstream.Other visited network nameRequired only when “Other visited network” is chosen.Primary coverage in the room confirmed?Primary intended use permitted?

Backup / Actual connection path

Backup labelBackup visited networkNot the shop or eSIM retailer. Wi-Fi does not identify its upstream.Other visited network nameRequired only when “Other visited network” is chosen.Backup coverage in the room confirmed?Backup intended use permitted?

Shared points and a real switch

For shared-point questions, “Yes” means a shared failure risk. “No” means manually checked separate paths, not a guarantee.

Both paths need the same device?Both paths need the same router / hotspot?Both paths depend on the same power supply?Actual application handover tested?

Two purchases can still be one failure.

A retailer sells a product; the visited network carries the mobile connection. Two retail eSIM brands may use the same visited network. True / dtac are treated here as possibly shared, not independently resilient. Different named networks reduce one entered dependency, but may still share infrastructure.

A hotel Wi-Fi name tells you neither its upstream provider nor the power arrangement. The checker keeps that relationship unknown. Separate subscriptions on the same phone, or two radios relying on one router, still share a device failure.

Illustrative example / Not a network audit

Change the path, not just the label.

An entered True connection plus dtac on the same phone and power source raises both possibly shared infrastructure and device/power risks. An entered AIS backup on a separate charged device changes the named-network and device dependencies, but room coverage and permitted use still need checking.

Practice the handover before the call.

Know how to switch the laptop, keep enough battery for both devices and open the actual application on the backup. This manual checklist cannot establish independent backhaul, predict an outage or certify live reception. Use the preflight for a local observation, then test the real service.