Understanding O2 Roaming Charges in Europe and the USA

Roaming charges confuse most O2 customers. We explain how they work, so you know what to check before calling.

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What usually causes a roaming charge

A roaming charge usually appears because your phone used data, calls or texts outside your plan's covered area. That area normally costs nothing extra. On most plans this area is a defined list of European destinations. The rest of the world is priced separately. The charge can also appear by accident, for example near a border, on a ferry or during a flight.

Your bill shows roaming charges in a separate section, labelled by date and destination. If a figure there looks wrong, that is a question for O2, not for us.

Europe: the inclusive zone and its limits

On most O2 plans, using your phone across a set list of European destinations draws on your UK data allowance. It does not cost extra.

This inclusive use has a fair-use limit for time spent abroad. Spend longer than that in any four months and O2 may apply its own roaming rates. Destinations and limits are confirmed on O2's published roaming pages.

USA and the rest of the world: daily bolt-ons

Outside the inclusive European zone, O2 typically prices roaming by the day. A daily travel bolt-on covers a wide list of destinations, including the USA. A data-only bolt-on can be sized to the trip instead. Check which applies before you travel.

Inadvertent roaming: ferries, borders and flights

Your phone connects to whichever signal is strongest, not necessarily a UK one. Charges can appear even when you stayed in the UK:

• Near a land border, where a foreign mast is sometimes closer.
• On a ferry, where signal can come from either coastline.
• On a cruise ship, often billed as international roaming.
• During a flight, unless you switch to flight mode.

Since Ofcom's roaming-alert rules took effect, O2 should typically warn you when roaming on an unexpected network. Check your text and app alerts. The date and source are listed above and on our sources page.

The roaming spend cap

O2 publishes its own roaming spend-limit rules on its site and in the My O2 app. Check these before travelling.

Roaming versus international calls

Roaming is using your phone abroad. An international call is dialling a foreign number from the UK, priced and billed separately. If a bill looks high, check whether the cost sits in the roaming section or the international-calls section. Do this before you speak to O2.

Hand-off: who does what

Before the call, with us:

• We explain how your inclusive zone, fair-use limit and bolt-ons work.
• We help you work out whether a charge is roaming or an international call.
• We help you plan the questions to put to O2.

Hand-off: this is where O2 takes over

With O2:

• Checking the exact charge on your account.
• Confirming your destinations and fair-use limit.
• Adjusting any charge, if they agree it is wrong.
• Setting up or cancelling a bolt-on.

What to check before your call with O2

Note this so the call is quicker.

• The date, destination and amount of the charge on your bill.
• Whether you were in the inclusive European zone or outside it.
• Whether a daily or data bolt-on was active on that date.
• Any inadvertent-roaming text alert you received.
• Whether your plan has a spend cap, shown in the My O2 app.

Where this leads next

For a price rise, see O2 price rise. For every line of your bill, see O2 bill explained. For a higher-than-expected bill, see O2 bill help. You can also read how phoneswitcher works or check our sources.