Sky Mobile 1GB SIM, £1/mo (£5 after 12 months), 24 months

- No upfront cost

Tesco Mobile SIM only plans on O2's network from £8/month, earn Clubcard points on every bill, free EU roaming in 45 destinations, 5G included as standard. No mid-contract price rises for Clubcard members.
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The table below shows the full range of 12-month Tesco Mobile SIM-only contracts available right now. All plans include unlimited UK calls and texts.
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Clubcard members can access further discounts on selected plans. For example, the 12GB plan drops to £9 a month on a 24-month contract with a £20 Clubcard voucher paid automatically, no claiming needed. Prices shown in the table above are the standard (non-Clubcard) 12-month rates.
Tesco Mobile keeps its pricing simple and its contracts honest. Here is what stands out from the competition:
You earn 1 Clubcard point for every £1 you spend on your monthly plan. Points go into your Tesco Clubcard account and can be used in Tesco stores or converted into Clubcard vouchers. Some plans also offer one-off point bonuses, for example, spending £50 or more on a Tesco shop in a single billing month can earn you an extra 300 Clubcard points, worth £3 in Clubcard vouchers. Over a 12-month contract, those extras add up quickly.
Tesco Mobile's Home From Home scheme lets you use your minutes, texts, and data allowance in 45 destinations, including all EU countries, at no extra charge. Tesco Mobile has confirmed it has no current plans to add roaming fees for European travel. That makes it one of the few UK networks still offering genuinely free EU roaming.
Every Tesco Mobile SIM-only plan includes 4G and 5G as standard. You do not pay more for a 5G plan, the price is the same whether you use 4G or 5G. As long as you have a 5G-compatible phone and live in a covered area, you get faster speeds automatically. The network records a median 5G download speed of around 82.8 Mbps, based on 2024 RootMetrics data.
Most UK networks apply annual inflation-linked price increases mid-contract. Tesco Mobile does not apply those increases to Clubcard members. The price you sign up for stays the same for the life of the contract, which is a meaningful saving on a 24-month deal.
If you are somewhere with a weak mobile signal but a decent Wi-Fi connection, Tesco Mobile lets you make and receive calls over Wi-Fi at no extra charge. Calls come out of your monthly allowance as normal. 4G Calling (VoLTE) also means clearer call quality on 4G networks.
Not sure which plan is right for you? Average UK mobile data usage sits at around 9GB a month. Light users who mainly browse and message can get by on 5 to 12GB. Regular streamers and social media users usually need 30 to 60GB. If you use your phone as a hotspot or stream video daily, 100GB or unlimited is worth considering.
Switching is straightforward and takes just a few minutes to set up. Here is the process:
Find the Tesco Mobile SIM-only deal that matches your data needs and contract preference using Switch.
If you are keeping your current number, text PAC to 65075 from your existing phone. You will receive a porting authorisation code.
Choose the deal, complete the application, and provide your PAC code when prompted.
Wait for the SIM to arrive (typically 1 to 5 working days). You can also pick one up in a Tesco store.
Insert the SIM and follow the on-screen activation steps. Tesco Mobile uses Tri-SIMs, one card with all three sizes, so it fits any phone.
Your number transfers within one working day with no gap in service. If you are switching from a different O2 MVNO, your coverage experience will remain the same.
Tesco Mobile sits in a competitive space. Here is how it stacks up against other popular SIM-only providers:
Tesco Mobile shares O2's network so coverage is identical. Prices are typically lower on Tesco Mobile, you get the same signal for less. The trade-off is that O2 offers perks like priority event tickets and exclusive offers, which Tesco Mobile does not match. If Clubcard points matter to you, Tesco Mobile wins.
Vodafone runs its own network infrastructure, which can be stronger in some rural areas where O2 has gaps. Tesco Mobile is generally cheaper for mid-range data plans. You can compare Vodafone SIM-only deals on Switch if you want to compare both side by side.
SMARTY is another O2-based MVNO with highly competitive per-GB pricing on 30-day plans. SMARTY does not offer Clubcard rewards, but its rolling plans include unlimited calls and texts, something Tesco's Rocket Packs do not offer. If you want maximum flexibility without a contract, SMARTY is worth a look.
Sky Mobile runs on O2 too and offers data rollover, any unused data rolls into a Piggybank you can spend later. Prices are similar to Tesco Mobile at the higher data tiers. Sky Mobile suits you if you have variable monthly usage; Tesco Mobile suits you if you are a regular Tesco shopper and want Clubcard value.
Tesco Mobile SIM-only deals work best for:
Who want to earn points on their mobile bill.
Who want strong UK coverage without paying premium network prices.
And do not want to pay roaming fees.
Without paying more for it.
Tesco Mobile offers family plans with extra perks per member added.
Tesco Mobile is less suited to you if you want lots of brand perks like free streaming subscriptions, or need coverage in very rural areas where O2 has known gaps.
Switch pulls together SIM-only deals from Tesco Mobile and every other major UK provider in one place, updated daily. You can filter by data, contract length, and monthly cost to find the right plan in seconds, and check whether switching to a different network could save you more.
Comparing through Switch costs you nothing. If you find a Tesco Mobile deal that fits, you can go straight through to order from this page. If something else looks better value for your usage, you can compare that too.
Say how much data you use and Squid AI picks the cheapest SIM that fits.
Tesco Mobile runs on O2's network infrastructure, giving you 99% UK population coverage on 4G and 5G in over 3,200 towns and cities, identical coverage to O2 direct, at a lower price.

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