Line Guard

When the line goes dead at 1 a.m., it may not be the network.

In a SIM swap, a fraudster gets a customer's number moved to a new SIM card and receives their wallet and bank codes. The first sign is that the phone loses its line. Line Guard notices within minutes, warns the customer, and tells someone they trust while there is still time to freeze the wallet.

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How it works

The Android app watches for a lost mobile line while Wi-Fi still works, or a removed SIM card.
Where the operator offers the CAMARA SIM Swap API and the customer consents, Line Guard also asks whether the number moved to a new SIM in the last 24 hours.
If the customer does not answer the alarm, a trusted contact receives the steps and the wallet helpline number.
Wallets and banks can query a number's SIM swap risk before a large transfer.

What it covers

Line lost	Three minutes without a mobile line while Wi-Fi internet works, after normal service.
SIM removed	Detected by the Android app.
Number moved	From the operator's SIM Swap API, where available and with consent.
Network outage	Many customers losing service on one operator together is treated as an outage, so contacts are not alarmed.

Write to us with a line about your system or your team. We reply from a named person within two working days.

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