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5G SIM Only 5GBFree EU RoamingFree Roaming up to 30GB5GBdataUnltdminutesUnltdtexts1month contractZeroupfront cost£5.00per monthGet DealiD Mobile
Smarty 5GB5GBdataUnltdminutesUnltdtexts1month contractZeroupfront cost£5.00per monthGet DealSmarty
Lite SIM Only 3GB3GBdataUnltdminutesUnltdtexts24month contractZeroupfront cost£5.00per month(prices may change during contract)Get DealThree
Lite SIM Only 3GB3GBdataUnltdminutesUnltdtexts12month contractZeroupfront cost£5.00per month(prices may change during contract)Get DealThree
5G SIM Only 8GBFree EU RoamingFree Roaming up to 30GB8GBdataUnltdminutesUnltdtexts1month contractZeroupfront cost£6.00per monthGet DealiD Mobile
5G SIM Only 8GBFree EU RoamingFree Roaming up to 30GB8GBdataUnltdminutesUnltdtexts24month contractZeroupfront cost£6.00per monthGet DealiD Mobile
5G SIM Only 6GBFree EU RoamingFree Roaming up to 30GB6GBdataUnltdminutesUnltdtexts12month contractZeroupfront cost£6.00per monthGet DealiD Mobile
5G SIM Only 5GBFree EU RoamingFree Roaming up to 30GB5GBdataUnltdminutesUnltdtexts1month contractZeroupfront cost£6.00per monthGet DealiD Mobile
golden goodybagFree EU Roaming2GBdataUnltdminutesUnltdtextsNo contractZeroupfront cost£6.00per monthGet Dealgiffgaff
goodybag 1GBFree EU Roaming1GBdataUnltdminutesUnltdtextsNo contractZeroupfront cost£6.00per monthGet Dealgiffgaff
5G SIM Only 30GBFree EU RoamingFree Roaming up to 30GB30GBdataUnltdminutesUnltdtexts24month contractZeroupfront cost£7.00per monthGet DealiD Mobile
5G SIM Only 25GBFree EU RoamingFree Roaming up to 30GB25GBdataUnltdminutesUnltdtexts1month contractZeroupfront cost£7.00per monthGet DealiD Mobile
5G SIM Only 25GBFree EU RoamingFree Roaming up to 30GB25GBdataUnltdminutesUnltdtexts12month contractZeroupfront cost£7.00per monthGet DealiD Mobile
5G SIM Only 20GBFree EU RoamingFree Roaming up to 30GB20GBdataUnltdminutesUnltdtexts12month contractZeroupfront cost£7.00per monthGet DealiD Mobile
5G SIM Only 15GBFree EU RoamingFree Roaming up to 30GB15GBdataUnltdminutesUnltdtexts1month contractZeroupfront cost£7.00per monthGet DealiD Mobile
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Why choose a BT SIM only deal?

According to BT Mobile there are a number of reasons you should choose it over any other. We admit, though, that many of these pluses you will also find among other providers.

  • 4G and 5G in more places than O2, Vodafone and Three – Is a brag that BT itself adopts when advertising its SIMs. What it really means is that BT Mobile piggybacks onto the EE network, which has better 4G and 5G coverage than its competitors, according to independent reports
  • 30-day money back guarantee – BT Mobile is so certain you will be happy with its SIM Only, Data SIM or Family SIM plans, that it will it will cancel your contract and refund your first monthly plan charge if you’re unhappy for any reason during the first 30 days of use
  • Roam like home – You can use your BT Mobile SIM abroad with no additional charges in up to 47 countries – mostly in the EU. You can see the full list in the roaming section further down the page
  • Add more SIMs and save – If you have other family members who also have phones, you can save money getting additional SIMs from BT Mobile. BT’s Family SIM plans add additional discount for up to four additional SIMs. Each additional SIM is at least 20% cheaper than getting a SIM on its own.
  • Offers and rewards frequently available – Often, depending on when you look, BT Mobile will offer incentives to sign up, such as gift/reward cards and/or free gifts. And because BT Mobile runs on the EE network, select mobile plans include exclusive EE benefits and incredible entertainment including Apple Music, BT Sport Ultimate, Netflix and more.

Is BT Mobile a good network?

Not all mobile networks are actual networks, technically speaking. There are actually only four separate mobile networks in the UK, and even they share many of the same masts. They are Three, O2, EE and Vodafone. All other providers – BT Mobile, for example – 'piggyback', or borrow capacity, from one of those four networks.

BT Mobile piggybacks on the EE network, which BT indirectly owns. Happily, EE offers the widest coverage and best data speeds of all of the four network providers, so you are in good hands. EE covers over 99.9% of the UK population with its signal, and offers data download speeds of up to 30Mbps on BT’s standard data plans in most places, and speeds of up to 60Mbps with BT’s optional Extra Speed 4G add-on.

Data and calling features

There are a standard set of desirable features you should look for with any mobile provider you are considering signing up to. BT Mobile is no different. Let's see how it does.

  • 4G data speed – Being on the EE network means BT Mobile shares the best coverage and data speeds with EE. BT also owns EE, by the way. You can find BT Mobile's data speeds in the section above
  • Data rollover – BT Mobile, at the time of writing, has no data rollover scheme. That means unused data at the end of the month essentially disappears for good
  • Tethering – This is where you use your phone's data allowance and connection to the internet as a mobile broadband router, allowing you to connect other devices. BT Mobile allows unlimited tethering up to your data allowance
  • WiFi calling – EE has been a pioneer in WiFi calling – that is, using your home WiFi to make calls where mobile signals might otherwise be weak. As such, WiFi calling is available on all BT Mobile SIM deals
  • Data gifting – This is where you can transfer unused data allowance to a friend or family member on the same network. Sadly, BT Mobile is not a provider which offers it
  • Data caps – This is where you can set a defined limit on the amount of data you wish to use across a given period. Rather than allow you to cross this limit, your provider will cut off your data to prevent you from spending money you would rather not. All BT Mobile SIMs offer the option of spending caps, which are the same in all but name. Rather than set a data limit you can tell BT you never want to spend more than X amount on your monthly bill. This will protect you from accidental spending if abroad or calling numbers not included in your free minutes
See also

Frequently asked questions

Which network does BT Mobile use?

BT Mobile operates on the EE network. Of all the four UK network providers, EE offers the widest coverage and best 4G and 5G speeds.

Is BT Mobile any good?

You can read our full review of BT Mobile as a provider by simply following the link.

Can I get a SIM card for BT Mobile?

Yes. Any of the deals available on this page will net you a free SIM from BT Mobile. Simply head to the comparison portion of the page to see what's available. Listings are updated daily.

Are BT Mobile SIMs all 4G?

Yes. 3G does still exist in some areas as a fallback – if you can't get 4G where you happen to be at a given moment your phone will try to find the best signal available, and that may be 3G. However, so long as your signal is good, you will be getting the fastest 4G from BT Mobile, via the EE network.

How do I cancel BT Mobile SIM only?

You can cancel your BT Mobile SIM deal any time in the first 30 days after signing up. Alternatively, if there is some sort of reception issue that manifests thereafter and BT Mobile is unable to get it fixed, you can also leave before the end of your contract.

Can I use a BT Mobile SIM in an EE locked phone?

Yes, in the sense that you can get your phone unlocked prior to putting in the new SIM. No, in the sense that if you just put it in prior to unlocking it won't work. Even though BT Mobile and EE share the same network, it doesn't follow that the SIMs are interchangeable on locked phones.