Unlimited.
The time is now.

A second SIM.
Your number stays where it is.

Unlimited 5G data and calls. Rolling 30 days. No contract.

This is our small print.

Unlimited means unlimited. It’s a second SIM, so nothing changes with your number. 30 days at a time. Leave whenever. Done.

Two plans. Pick one.

Both unlimited at home. Both rolling.
Both a second SIM next to your main one.

Second SIM · UK

Unlimited at home. No roaming.

£15/ month inc VAT

A second line with its own new number
Unlimited UK data, 5G included
Unlimited UK calls and texts
Tether as much as you like
eSIM by email within 3 hours (9am–5pm, Mon–Fri), or a SIM posted within 48 hours
Wi-Fi calling included
No roaming, so no roaming bills

Choose UK

Europe included

Second SIM · UK + Europe

Unlimited at home. 35GB a month across Europe.

£20/ month inc VAT

Everything in Boundless UK
Data, calls and texts across the EU and EEA
35GB of data a month in Europe, no daily charge
2,000 minutes and texts a month to EU numbers from the UK
Drop to £15 at any renewal

Choose Europe

The rules, in plain English. UK data is truly unlimited: no caps, no throttling. In Europe you get unlimited calls and texts and 35GB of data a month, with no daily charge. No credit check on either plan. Prices include VAT.

Who Boundless is built for.

It’s a second SIM, next to the one you already have.

In and out of Europe

You land, you switch data to Boundless, you forget about it.

35GB a month across Europe, calls and texts included, no daily charge. Your main SIM stays off until you’re home.

Family across Europe

Mum in Lisbon. Cousins in Kraków. Calls included.

2,000 minutes and texts a month to EU numbers from the UK, on the £20 plan. No app, no call-back trick.

Work and life, apart

One phone. Two numbers. Nobody from work on your personal line.

Give out the Boundless number for work, the shop, the side hustle, the dating app. Keep your real number for the people who matter.

Working anywhere

Hotspot the laptop. Skip the café’s Wi-Fi.

Unlimited 5G means the laptop, the tablet and the call all run off your own line, not a password on a chalkboard.

Two networks, one phone

When one network drops, the other usually has bars.

Your main SIM on its network, Boundless on ours. Flip between them in Settings; your phone does the rest.

Heavy users

Streaming, gaming, AI tools running all day. Never rationed.

Put the data on Boundless and let your main plan do the calls. Unlimited means you stop watching the meter.

Get a SIM How a second SIM works

Unlimited here.
Europe included.
Join the Crew.

Land in Lisbon, Berlin or Bled and your phone just carries on: unlimited calls and texts, 35GB of data a month, no daily charge. Back home, call them on us too.

See Europe

Already on Boundless? Bring a mate and get £2.50 a month off for every friend on Europe, up to £30 a friend. Join the Crew

Unlimited here. Europe included. Be boundless.

Get a SIM

Unlimited.The time is now.