Tesco Mobile SIM only deals

Our best Tesco Mobile SIMs this week

Why choose a Tesco Mobile SIM?

• Clubcard Prices: Tesco Mobile offers cheaper Clubcard Price deals for Clubcard members. It also says the basic monthly usage price is frozen for the length of the contract on Clubcard Price deals
• Shopping perks: You'll also get free Clubcard points every time you pay your bill
• 99% 4G UK coverage claim: Tesco Mobile powered by O2’s network and says it offers 99% 4G coverage across the UK.
• 5G available: Tesco Mobile says 5G is available in parts of most major UK towns and cities, as well as many smaller towns and villages
• No EU roaming fees: Tesco Mobile’s Home From Home benefit lets customers use UK data, minutes and texts in 48 destinations across the EU and beyond at no extra cost
• Unlimited data options: Tesco Mobile says its unlimited data plans have no data caps and no speed limits, subject to fair usage and personal mobile use
• O2 ranked strongly for coverage: OpenSignal’s January 2026 UK Mobile Network Experience report found O2 won the overall Coverage Experience award

What to look for in a Tesco Mobile SIM contract?

When comparing Tesco Mobile SIM only deals, start with the data allowance and contract length. Tesco Mobile says its SIM only contracts include unlimited minutes and texts, so the main difference between plans is usually how much data you get and whether you choose a 12-month or 24-month contract.

It’s also worth checking whether the plan is a Clubcard Price deal. Tesco Mobile says Clubcard customers can access cheaper SIM only deals, and that the basic monthly usage price is frozen for the length of the contract on Clubcard Price deals. That can make Tesco Mobile more attractive if you already use Tesco regularly.

Coverage should be checked before you buy. Tesco Mobile uses O2’s network, and Tesco Mobile says this gives customers 99% 4G UK coverage, but signal can still vary by postcode, terrain, building type and local congestion. Tesco Mobile also says its coverage checker is based on predictions, so local results should be treated as a guide rather than a guarantee.

Compare Tesco Mobile against other networks in the market here.

Is Tesco Mobile a good network?

Tesco Mobile can be a good network if you want an O2-powered SIM only plan with supermarket-style value and Clubcard benefits. It may be especially appealing if you already shop at Tesco, thanks to Clubcard Price deals, fixed basic monthly usage prices on Clubcard Price plans, and Home From Home roaming in 48 destinations.

Tesco Mobile also offers customers Clubcard points for every £1 they spend on their mobile bills. That means you can get money off your weekly grocery spend. Or you can get double the number of points if you opt to spend them with Tesco Mobile, which means you can trim your monthly SIM only bill.

Tesco Mobile uses O2’s network, so its coverage depends on O2’s mobile infrastructure rather than a separate Tesco network. Tesco Mobile says it offers 99% 4G coverage across the UK through O2’s network, while OpenSignal’s January 2026 UK report found that O2 won the overall Coverage Experience award. That makes Tesco Mobile worth considering if broad coverage matters more to you than having the fastest possible speeds.

It's also worth noting that Tesco Mobile has a good reputation among its customers. Ofcom research shows that Tesco Mobile earned the fewest complaints of any network at 1 per 100,000 - while Tesco Mobile's Trustpilot score is a Great 4.2 from over 80,000 reviews.

The main caveat is speed. OpenSignal’s January 2026 data put O2 fourth for overall download speed, behind EE, Three and Vodafone. So Tesco Mobile should be fine for everyday browsing, messaging, maps, social media and streaming, but it may not be the strongest choice if your priority is top-end mobile speed.

Read our full Tesco Mobile network review here.

How does Tesco Mobile compare to other UK networks?

Data sourced from Opensignal Mobile Network Experience Report January 2026

Cheap Tesco Mobile SIMs

Can I use my Tesco Mobile SIM abroad?

All Tesco Mobile SIM customers can use their minutes, texts and data in 48 locations in Europe and beyond for no extra charge, with its Home from Home scheme. However, in locations not covered additional roaming charges will apply.

The locations covered by Home from Home are: Austria, Belgium, Bulgaria, Croatia, Republic of Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland (Republic of), Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Azores, Canary Islands, French Guyana, Gibraltar, Guadeloupe, Guernsey, Iceland, Isle of Man, Jersey, Liechtenstein, Madeira, Martinique, Mayotte, Monaco, Norway, Reunion, San Marino, St Martin, St Barts, Switzerland and Vatican City. 

Can I get 5G-enabled Tesco Mobile SIMs?

Yes, you can. And the good news is that you won’t pay any more than you would for 4G. The bad news is that you’ll need a 5G-compatible phone. And you’ll need to be in area where Tesco Mobile’s 5G service is available.

Can I keep my mobile phone number if I switch to a Tesco Mobile SIM-only deal?

Porting your number to Tesco Mobile is easy. All you need to do is contact the network you’re leaving to request a PAC (porting authorisation code), which you can do by phone or by text message. Once you’ve got your PAC, you’ll just need to give it to Tesco Mobile, which will use it transfer your number.

Do I need an unlocked phone to use a Tesco Mobile SIM?

If your phone is locked to another network, you'll need to get it unlocked to be able to use a Tesco Mobile SIM.

The good news is that for the last few years most networks have been selling their phones unlocked.

To find out for sure if your phone is locked, just find a friend or family member who’s on a different network to you and insert their SIM in your phone.

If the SIM works, your phone is unlocked. If not, you’ll need to contact to your network to unlock it and a fee may be payable.

Are Tesco Mobile SIM only deals cheaper than contract?

Getting a Tesco Mobile SIM only deal is pretty much always cheaper than signing up for a phone-and-SIM contract. That’s because you’re only paying for your monthly allowances and aren’t paying for a new smartphone.

Is Tesco Mobile a good choice for rural areas?

Tesco Mobile can be a good choice for rural areas if O2 has strong coverage where you live. Tesco Mobile uses O2’s network and says it offers 99% 4G coverage across the UK, but rural signal can still vary by postcode, terrain and indoor location. Check the coverage checker before choosing a plan.

Is Tesco Mobile a good network for gaming and streaming?

Tesco Mobile should be suitable for streaming and casual gaming where O2 coverage is strong. OpenSignal’s January 2026 report found O2 performed well for coverage, but ranked behind EE, Three and Vodafone for overall download speed. For competitive gaming, heavy hotspot use or regular 4K streaming, compare local O2 performance before choosing a Tesco Mobile plan.