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Channel Islands + Isle of Man specialist

Sure (formerly Sure CW)

Sure is the legacy Cable & Wireless brand for Guernsey, Jersey and the Isle of Man, now owned by Batelco (Bahrain Telecommunications Company). Mobile, broadband and business services for island residents and enterprises. This page is for UK customers wondering what Sure is and how to contact them.

Brand origin

2008

From the Cable & Wireless break-up

Territories

3

Guernsey, Jersey, Isle of Man

Network type

Local host

Owns and operates the local mobile network

Owner

Batelco

Bahrain Telecommunications Company

About

Who is Sure?

Sure (originally Sure CW, where CW stood for Cable & Wireless) is a telecommunications brand that operates in the British Crown Dependencies of Guernsey, Jersey and the Isle of Man, plus a handful of British Overseas Territories and Caribbean islands. The brand was created in 2008 after the regional break-up of Cable & Wireless Communications.

In 2014, Sure was acquired by Batelco, the Bahrain Telecommunications Company. Today Sure provides consumer mobile, broadband, business mobile, managed services and inbound roaming on its own physical 4G and 5G networks in each of its territories.

Sure is regulated locally by each territory’s telecom regulator (CICRA on Guernsey + Jersey, Communications Commission on the Isle of Man) rather than by Ofcom, since the islands are outside the UK proper.

Three territories

Where Sure operates

Guernsey

Sure operates the largest mobile network on Guernsey, with consumer plans, business mobile, broadband and managed services. HQ at Sure House in St Peter Port.

Website
sure.com/gg
Contact
700 700

Jersey

Sure is one of three Jersey mobile networks (alongside JT and Airtel Vodafone). Full consumer + enterprise services with a focus on island-resident plans and inbound roaming.

Website
sure.com/je
Contact
700 700

Isle of Man

Sure shares the Isle of Man mobile market with Manx Telecom. Strong on residential broadband and business services in addition to mobile.

Website
sure.com/im
Contact
247 247

Current offers and prices

Sure mobile SIM-only plans available now

Indicative monthly prices verified on from sure.com. Sure’s pricing varies slightly between Guernsey, Jersey and the Isle of Man; the cards below show the headline rate for the noted territory.

Entry

Sure logo

Sure SIM 2 GB

Guernsey

Data

2 GB

4G + 5G

Calls + texts

Unlimited

Island + UK

£12 /month

30-day rolling . £0 upfront

  • Unlimited UK + island minutes
  • Unlimited texts
  • Free Sure-to-Sure calls

Best for

A second SIM or light user on Guernsey

See on Sure
Best value for most

Best value

Sure logo

Sure SIM 15 GB

Guernsey + Jersey

Data

15 GB

4G + 5G

Calls + texts

Unlimited

Island + UK

£20 /month

30-day rolling . £0 upfront

  • 15 GB 4G + 5G data
  • Inclusive UK roaming
  • Same price in Guernsey and Jersey

Best for

A typical island-resident smartphone user

See on Sure

Heavy data

Sure logo

Sure SIM 50 GB

Isle of Man

Data

50 GB

4G + 5G

Calls + texts

Unlimited

Island + UK

£28 /month

30-day rolling . £0 upfront

  • 50 GB headroom
  • Tethering allowed
  • UK + EU roaming included

Best for

Daily commuters and streamers on the Isle of Man

See on Sure

Top tier

Sure logo

Sure SIM Unlimited

All territories

Data

Unlimited

4G + 5G

Calls + texts

Unlimited

Island + UK

£35 /month

30-day rolling . £0 upfront

  • Unlimited 4G + 5G data
  • Unlimited tethering
  • Inclusive UK + EU roaming

Best for

Households without home broadband, heavy mobile use

See on Sure

Selectra is independent. Sure does not pay us to feature any of these plans. Always confirm the current price on the relevant sure.com territory site before subscribing.

FAQ

Sure CW, your questions answered

Is Sure CW still a thing?

The brand was rationalised to just Sure after the Batelco takeover; the “CW” (for Cable & Wireless) is no longer used in marketing. If you have a Sure CW SIM, your service continues as before but the company trades as Sure. The legacy domain redirects to sure.com.

Which territories does Sure cover?

Three: Guernsey, Jersey and the Isle of Man. Sure runs the largest mobile network on Guernsey, is one of three networks on Jersey, and one of two networks on the Isle of Man. Sure also operates in Diego Garcia, the South Atlantic and several Caribbean territories under the same brand.

Can I use Sure on the UK mainland?

Yes, as a visitor or roamer. Sure customers from the Channel Islands or the Isle of Man can roam on UK networks (typically Vodafone or O2 as the partner) when they cross to the mainland; check your specific plan for roaming inclusivity. As of 2026, Sure does not sell UK mainland-resident SIMs.

How do I contact Sure?

Different number per territory. Guernsey: 700 700 from a Sure mobile, or 01481 700 700 from any phone. Jersey: 700 700 from Sure, or 01534 700 700 from any phone. Isle of Man: 247 247 from Sure, or 01624 247 247 from any phone. Live chat is also on each territory’s sure.com site.

Does Sure have 5G?

Partially in 2026. Guernsey launched 5G in 2022; Sure has progressively expanded coverage across the island. Jersey rolled out 5G in 2023. The Isle of Man 5G rollout is slower but live in Douglas and the larger towns. Outside 5G postcodes, all three islands fall back to Sure’s 4G network, which has near-total population coverage.