Check coverage predictions for your home and each network you are considering, then see whether your existing phone and mobile service support Wi-Fi Calling where you need it. If home broadband is dependable, that may avoid buying signal equipment; a static indoor repeater is worth considering only where there is a usable outdoor signal and the exact device meets applicable Ofcom requirements. Otherwise, compare another network or ask your provider about an indoor coverage option.
If you have usable home broadband but weak indoor mobile signal, check whether your phone, software and mobile service support calls and texts over Wi-Fi before replacing equipment. EE, O2 and Vodafone each set device or service conditions for this feature.
If a usable signal reaches the property but calls fail inside, a static indoor repeater may be an option. Ofcom says repeaters work best with a good outdoor signal; the exact device must meet applicable requirements and suit the network you use.
If Wi-Fi Calling is unsuitable or unreliable, compare networks for your address before switching. Ofcom cautions that coverage predictions can differ from service at an individual property.
Identify whether the obstacle is phone and service compatibility, home Wi-Fi, signal reaching the house, or the current network's coverage. That distinction determines which purchase or service change is worth investigating.
| Concern | What to check | Who this matters to |
|---|---|---|
| Wi-Fi calls and texts | Confirm Wi-Fi Calling and SMS-over-Wi-Fi support for the exact phone variant, software and intended mobile service. O2 notes that SMS support depends on device firmware. | If I rely on calls and texts at home, a Wi-Fi Calling setting alone does not tell me whether both will work with my network. Around 33% of consumers put that compatibility first. |
| Home Wi-Fi reliability | Try calls in the problem rooms and distinguish weak local Wi-Fi from an unstable broadband connection before choosing Wi-Fi equipment. | When calls break up in particular rooms, I need to know whether the connection there is dependable. For around 27% of consumers, home Wi-Fi reliability is the primary concern. |
| Indoor repeater suitability | Check for a usable outdoor signal, then check the exact static indoor device against Ofcom's applicable requirements and the networks it is intended to serve. | If my phone works outside but not indoors, relaying that signal may be worth investigating, provided the equipment is suitable and permitted. Around 20% of consumers prioritise this route. |
| Network or provider option | Compare property-level coverage predictions and the intended provider's current service options; check any commitment terms before switching. | If the other routes do not suit my home, I need a service that works at this address rather than a broad coverage claim. That is the main concern for around 20% of consumers. |
Ofcom says indoor repeaters work best when there is a good outdoor signal to relay, and equipment that fails its applicable technical requirements remains illegal.
Check signal at the property and assess the exact static indoor model's requirements and network suitability before buying.
Installation takes effort even when the equipment is suitable.
Three and Vodafone describe compatibility conditions linked to the phone and where it was bought. A supported-looking model may still need a specific version or configuration.
Check your provider's current guidance for the exact handset, software and mobile service before replacing a phone or switching networks.
Ofcom says operator coverage maps use predictions; local conditions can prevent service at a property even where coverage is predicted.
Use address-level results to narrow the options, then check the proposed service at the property and review its commitment terms.
Better room-to-room Wi-Fi cannot enable Wi-Fi Calling on an unsupported phone or service, or repair an unreliable broadband connection. Ofcom also says provider femtocells use home broadband.
Confirm Wi-Fi Calling support and test the connection in the rooms where calls fail before considering a router, mesh system or access point.
A Wi-Fi Calling option for households with weak indoor mobile coverage and a usable home Wi-Fi connection.
A network to check if both Wi-Fi calls and indoor texting matter.
A network with published device guidance for Wi-Fi Calling and SMS over Wi-Fi.
A network to assess against property-level coverage and exact-device Wi-Fi Calling support.
Yes, if your provider supports it on your mobile service and exact handset, and you have usable home Wi-Fi. EE says compatible customers can make and receive calls and texts over Wi-Fi even without mobile-network coverage; confirm text support with your own provider and device.
Not necessarily. Compatibility can depend on the network, handset version, software and purchase channel. Three warns that a supported model bought elsewhere may not work with its Wi-Fi Calling, so check the intended phone and service together.
Consider self-installation only for a static indoor device that meets Ofcom's applicable UK requirements and suits the network concerned. Ofcom says repeaters that fail its technical requirements remain illegal; check the exact product rather than relying on a generic signal-booster description.
A repeater needs an outdoor signal it can relay indoors; Ofcom says these devices work best where that signal is good. If you cannot find a usable signal at the property, compare networks for the address or ask your provider about an indoor option instead.
It may be if your provider offers a suitable option and your broadband is dependable. Ofcom describes a femtocell as equipment that connects to a mobile provider's network through home broadband; ask the intended provider about its current offer and eligibility before planning around one.
