Who this choice affects

People moving into a signal-sensitive home

Indoor calling and data matter at the new address. Ofcom notes that local conditions, including buildings and terrain, can make reception differ from a broad coverage prediction.

Workers changing regular locations

A network needs to work at the workplace and along journeys between regular locations, not just at the home postcode. Ofcom's local checker lets you compare those places separately.

Switchers who want to keep a number or limit commitment

Keeping an existing number and choosing a suitable minimum term both affect the switch. Ofcom's switching guidance explains the number-transfer process; contract terms need checking before signing.

What to check before choosing

Use Ofcom's Map Your Mobile checker to narrow the host networks at each regular location, then assess the provider, handset and commitment together. Its coverage predictions and local-area performance indicators are guides rather than guarantees for an individual room or journey.

Concern What to check Who this matters to
Coverage at regular locations Compare each network around the home, workplace and recurring route; inspect indoor and outdoor coverage separately. If calls and data need to work across several regular places, one promising postcode is not enough. Around 36% of consumers put reliability across those locations first.
Indoor calling Check the provider's Wi‑Fi Calling and 4G Calling requirements for the exact phone, software, SIM and plan, as applicable. When mobile reception is weak inside a home or workplace, I need calls to work where I spend time indoors. Roughly 29% of consumers prioritise that calling continuity.
Commute data Compare coverage along the recurring route and Ofcom's performance indicators for the relevant local areas. Data use on a regular journey matters even if service appears adequate at either end. About 21% of consumers make commute data their primary concern.
Commitment and switching Read the minimum term and early-exit conditions; check how to keep your number if changing provider. If my routine has not settled, I may want to avoid a lengthy commitment while arranging a straightforward switch. Around 14% of consumers put flexibility and switching first.

Mistakes that can change the decision

  • Choosing from a national coverage claim or one postcode

    Ofcom distinguishes predicted local coverage from local-area performance, and reception can differ indoors, outdoors and along a journey.

    Compare the home, workplace and recurring route before narrowing your network shortlist.

  • Assuming a phone supports every provider's calling features

    Wi‑Fi Calling and 4G Calling eligibility can depend on the provider, device, software, SIM or plan. Three warns that a supported phone bought elsewhere may not be compatible with its Wi‑Fi Calling.

    Check the selected provider's support information for the exact handset and service before buying.

    An incompatible choice may mean changing the handset, SIM or plan to use the intended calling feature.

  • Accepting a long commitment before trying a new routine

    Predicted coverage cannot establish how calls and data will work in every room or at every point on a commute.

    Check the minimum term and conditions for leaving early; consider an available shorter-commitment route while you assess the regular locations.

  • Relying on 3G for voice calls

    Ofcom says UK mobile network operators have completed their 3G switch-offs, making the selected provider's current calling arrangements important for an older phone.

    Confirm 4G Calling compatibility for the exact device and provider before switching or replacing a handset.

Network brands to compare

EE, O2, Three and Vodafone are host networks to compare at your regular locations using Ofcom's checker. A locally promising host network does not establish that every provider using it offers the same plan features or handset support.

EE

A host-network option for local coverage and performance comparisons.

  • EE says its Wi‑Fi Calling requires an eligible EE customer, a compatible phone and a UK Wi‑Fi connection.
  • Check the exact tariff and handset alongside the local network result; Wi‑Fi Calling does not establish mobile reception away from Wi‑Fi.

O2

A host-network option to assess at home, work and along the commute.

  • O2 publishes device and service conditions for Wi‑Fi and mobile-network calling.
  • O2 says eligibility depends on the relevant SIM, device and software; check any additional plan conditions for the calling feature you need.

Three

A host-network option whose local result should be considered with handset compatibility.

  • Three provides coverage and device-support information for checking its calling services.
  • Three warns that a supported phone purchased elsewhere may not be compatible with its Wi‑Fi Calling.

Vodafone

A host-network option for comparison across the locations that matter to you.

  • Ofcom includes Vodafone in its local network comparison.
  • Check the chosen provider's current network arrangement, tariff features and handset compatibility rather than assuming they match those of another provider using Vodafone.

Joybuy products related to this decision

Related products coming soon.

Questions about choosing and switching

Can Ofcom's checker guarantee service inside my new home?

No. Ofcom's Map Your Mobile provides local coverage predictions and separate area-performance information, but conditions at a particular address can differ. Compare the regular locations first, then assess service where you actually use it before taking a long commitment.

Should I check an older phone before changing network?

Yes. Ofcom says UK mobile network operators have completed their 3G switch-offs, so confirm that the exact phone supports the selected provider's current calling arrangements, including 4G Calling where needed.

Will Wi‑Fi Calling help where indoor mobile signal is weak?

It can help if the selected provider supports the feature on your exact phone and plan, and a usable Wi‑Fi connection is available. Check 4G Calling compatibility too if calls need to continue when you leave Wi‑Fi coverage.

How can I switch networks and keep my mobile number?

Request a PAC from your current provider and give it to the new provider. Ofcom says you can request one for a single-number switch by texting PAC to 65075; check your existing commitment before arranging the move.