If someone is hurt or in danger

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In Greece

Free, twenty-four hours, from any phone. It reaches police, fire, ambulance and the coastguard, and it is answered in Greek, English and French.

It works from a foreign phone, from a locked phone, and from a phone with no SIM in it. What it needs is a cellular signal — and a battery.

911

In Canada

Vancouver and Montreal — the days out, and the days back.

Either country, be ready to say where you are. Some phones send a location automatically and some do not, and it depends on the handset and the network as much as on you.

And either number is only as good as the signal. If someone is hurt where the phone shows nothing, getting a signal is the first job — back the way you came, higher ground, the nearest road.