SIM-only · every network
SIM-only deals: compare every UK network
The cheapest SIM-only deal we found on 25 Oct 2026 is Sky Mobile 1GB at a real cost of £3.00 a month (1GB data on O2). For unlimited data, Lyca Mobile UK Plan Unlimited is the best value at £12.50 a month. Every price is read from the network's own site and includes the price rises it has stated.
- Deals
- 93
- Networks
- 18
- 30-day plans
- 51
For most peopleAffiliate
Lyca Mobile National Plus
30GB data · EE network · No contract · £5.00 a month real cost
The lowest real cost for 10 to 49GB, which covers most people's monthly use with room to spare.
Every SIM-only deal, best value first
Real cost is what you actually pay each month across the plan: every price rise the network has announced is added in. 30-day plans are totalled over 12 months so they compare fairly.
| Provider and package | Data | Contract | Monthly price | Real cost | Deal |
|---|---|---|---|---|---|
Sky Mobile 1GB Roll spare data for up to a year · Change your data plan whenever you like | Data1GBO2 network · 5G | Contract24 monthsEU roaming extra | Monthly price£1.00£5.00 after 12 months | Real cost£3.00 /mo£72.00 over 24 months | See deal at Sky Mobile (opens in a new tab) |
Lyca Mobile UK Plan Smart Pay as you go bundle, no credit check · 100 international minutes included | Data5GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£3.50Fixed price | Real cost£3.50 /mo£42.00 over 12 months | See deal at Lyca Mobile (opens in a new tab) |
spusu spusu 5 Unlimited minutes · Free number transfer | Data5GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£4.90Fixed price | Real cost£4.90 /mo£58.80 over 12 months | See deal at spusu (opens in a new tab) |
Lyca Mobile National Plus Pay as you go bundle, no credit check · 100 international minutes included | Data30GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£5.00Fixed price | Real cost£5.00 /mo£60.00 over 12 months | See deal at Lyca Mobile (opens in a new tab) |
Sky Mobile 10GB Roll spare data for up to a year · Change your data plan whenever you like | Data10GBO2 network · 5G | Contract24 monthsEU roaming extra | Monthly price£5.00Fixed price | Real cost£5.00 /mo£120.00 over 24 months | See deal at Sky Mobile (opens in a new tab) |
Lebara 5GB 30-day plan No annual price rises · No credit check | Data5GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£5.00Fixed price | Real cost£5.00 /mo£60.00 over 12 months | See deal at Lebara (opens in a new tab) |
1pMobile 5GB 30-day plan 5G included, no speed caps | Data5GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£5.00Fixed price | Real cost£5.00 /mo£60.00 over 12 months | See deal at 1pMobile (opens in a new tab) |
Asda Mobile 3GB | Data3GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£5.00Fixed price | Real cost£5.00 /mo£60.00 over 12 months | See deal at Asda Mobile (opens in a new tab) |
Talkmobile 10GB 30 days | Data10GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£5.95Fixed price | Real cost£5.95 /mo£71.40 over 12 months | See deal at Talkmobile (opens in a new tab) |
iD Mobile 15GB 1 month plan No annual price rises · Roam in 50 destinations | Data15GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£6.00Fixed price | Real cost£6.00 /mo£72.00 over 12 months | See deal at iD Mobile (opens in a new tab) |
Smarty 5GB rolling monthly Wi-Fi calling · No annual price rises | Data5GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£6.00Fixed price | Real cost£6.00 /mo£72.00 over 12 months | See deal at Smarty (opens in a new tab) |
Talkmobile 30GB 30 days | Data30GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£6.95Fixed price | Real cost£6.95 /mo£83.40 over 12 months | See deal at Talkmobile (opens in a new tab) |
Lyca Mobile UK Plan Super Extra Pay as you go bundle, no credit check · 100 international minutes included | Data75GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£7.50Fixed price | Real cost£7.50 /mo£90.00 over 12 months | See deal at Lyca Mobile (opens in a new tab) |
spusu spusu 20 Unlimited minutes · Free number transfer | Data20GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£7.90Fixed price | Real cost£7.90 /mo£94.80 over 12 months | See deal at spusu (opens in a new tab) |
Talkmobile 60GB 30 days | Data60GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£7.95Fixed price | Real cost£7.95 /mo£95.40 over 12 months | See deal at Talkmobile (opens in a new tab) |
Tesco Mobile 2GB | Data2GBO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£7.50£7.95 from 1 Apr 2027, then £8.42 | Real cost£7.95 /mo£190.92 over 24 months | See deal at Tesco Mobile (opens in a new tab) |
iD Mobile 36GB 1 month plan No annual price rises · Roam in 50 destinations | Data36GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£8.00Fixed price | Real cost£8.00 /mo£96.00 over 12 months | See deal at iD Mobile (opens in a new tab) |
Smarty 32GB rolling monthly (special offer) Wi-Fi calling · No annual price rises | Data32GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£8.00Fixed price | Real cost£8.00 /mo£96.00 over 12 months | See deal at Smarty (opens in a new tab) |
Asda Mobile 10GB | Data10GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£8.00Fixed price | Real cost£8.00 /mo£96.00 over 12 months | See deal at Asda Mobile (opens in a new tab) |
Sky Mobile 5GB Roll spare data for up to a year · Change your data plan whenever you like | Data5GBO2 network · 5G | Contract24 monthsEU roaming extra | Monthly price£6.00£10.00 after 12 months | Real cost£8.00 /mo£192.00 over 24 months | See deal at Sky Mobile (opens in a new tab) |
giffgaff 5GB monthly rolling No credit checks | Data5GBO2 network · 5G | ContractNo contractEU roaming included | Monthly price£8.00Fixed price | Real cost£8.00 /mo£96.00 over 12 months | See deal at giffgaff (opens in a new tab) |
Ecotalk 3GB No price rises · Ethical Consumer Best Buy | Data3GBEE network · 5G | ContractNo contractEU roaming extra | Monthly price£8.00Fixed price | Real cost£8.00 /mo£96.00 over 12 months | See deal at Ecotalk (opens in a new tab) |
Talkmobile 100GB 12 months First 3 months half price | Data100GBVodafone network · 5G | Contract12 monthsEU roaming included | Monthly price£4.98£9.95 after 3 months | Real cost£8.71 /mo£104.49 over 12 months | See deal at Talkmobile (opens in a new tab) |
Talkmobile 100GB 30 days | Data100GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£9.95Fixed price | Real cost£9.95 /mo£119.40 over 12 months | See deal at Talkmobile (opens in a new tab) |
Lyca Mobile UK Plan Mega Plus Pay as you go bundle, no credit check · 100 international minutes included | Data120GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at Lyca Mobile (opens in a new tab) |
iD Mobile 100GB 24 month plan No annual price rises · Roam in 50 destinations | Data100GBThree network · 5G | Contract24 monthsEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£240.00 over 24 months | See deal at iD Mobile (opens in a new tab) |
iD Mobile 90GB 12 month plan No annual price rises · Roam in 50 destinations | Data90GBThree network · 5G | Contract12 monthsEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at iD Mobile (opens in a new tab) |
giffgaff 80GB 18 month plan No credit checks · No mid-contract price rises on 18 month contracts bought before the end of 2026 | Data80GBO2 network · 5G | Contract18 monthsEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£180.00 over 18 months | See deal at giffgaff (opens in a new tab) |
1pMobile 50GB 30-day plan 5G included, no speed caps | Data50GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at 1pMobile (opens in a new tab) |
Smarty 40GB rolling monthly Wi-Fi calling · No annual price rises | Data40GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at Smarty (opens in a new tab) |
Lebara 30GB 30-day plan No annual price rises · No credit check | Data30GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at Lebara (opens in a new tab) |
VOXI £10 plan Price locked: stays at the same monthly price · Unlimited data for 7 social media apps | Data20GBVodafone network · 5G | ContractNo contractEU roaming extra | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at VOXI (opens in a new tab) |
giffgaff 20GB monthly rolling No credit checks | Data20GBO2 network · 5G | ContractNo contractEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at giffgaff (opens in a new tab) |
Asda Mobile 15GB | Data15GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£10.00Fixed price | Real cost£10.00 /mo£120.00 over 12 months | See deal at Asda Mobile (opens in a new tab) |
Talkmobile 150GB 12 months First 3 months half price | Data150GBVodafone network · 5G | Contract12 monthsEU roaming included | Monthly price£5.97£11.95 after 3 months | Real cost£10.46 /mo£125.46 over 12 months | See deal at Talkmobile (opens in a new tab) |
Tesco Mobile 12GB | Data12GBO2 network · 5G | Contract12 monthsEU roaming included | Monthly price£11.00£11.66 from 1 Apr 2027 | Real cost£11.33 /mo£135.96 over 12 months | See deal at Tesco Mobile (opens in a new tab) |
Three 20GB Lite plan Three+ Rewards · Monthly price includes a £5 discount for paying by Direct Debit | Data20GBThree network · 5G | Contract24 monthsEU roaming included | Monthly price£10.00£11.90 from 1 Apr 2027, then £13.80 | Real cost£11.90 /mo£285.60 over 24 months | See deal at Three (opens in a new tab) |
Talkmobile 150GB 30 days | Data150GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£11.95Fixed price | Real cost£11.95 /mo£143.40 over 12 months | See deal at Talkmobile (opens in a new tab) |
Smarty 140GB rolling monthly (special offer) Wi-Fi calling · No annual price rises | Data140GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£12.00Fixed price | Real cost£12.00 /mo£144.00 over 12 months | See deal at Smarty (opens in a new tab) |
iD Mobile 100GB 1 month plan No annual price rises · Roam in 50 destinations | Data100GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£12.00Fixed price | Real cost£12.00 /mo£144.00 over 12 months | See deal at iD Mobile (opens in a new tab) |
VOXI £12 plan (3x data offer) Price locked: stays at the same monthly price · 3x data offer: 75GB instead of 25GB until 26 November 2026 | Data75GBVodafone network · 5G | ContractNo contractEU roaming extra | Monthly price£12.00Fixed price | Real cost£12.00 /mo£144.00 over 12 months | See deal at VOXI (opens in a new tab) |
giffgaff 50GB 18 month plan No credit checks · No mid-contract price rises on 18 month contracts bought before the end of 2026 | Data50GBO2 network · 5G | Contract18 monthsEU roaming included | Monthly price£12.00Fixed price | Real cost£12.00 /mo£216.00 over 18 months | See deal at giffgaff (opens in a new tab) |
Sky Mobile 25GB Roll spare data for up to a year · Change your data plan whenever you like | Data25GBO2 network · 5G | Contract24 monthsEU roaming extra | Monthly price£10.00£14.00 after 12 months | Real cost£12.00 /mo£288.00 over 24 months | See deal at Sky Mobile (opens in a new tab) |
Ecotalk 10GB No price rises · Ethical Consumer Best Buy | Data10GBEE network · 5G | ContractNo contractEU roaming extra | Monthly price£12.00Fixed price | Real cost£12.00 /mo£144.00 over 12 months | See deal at Ecotalk (opens in a new tab) |
Lyca Mobile UK Plan Unlimited Pay as you go bundle, no credit check · 100 international minutes included | DataUnlimitedEE network · 5G | ContractNo contractEU roaming included | Monthly price£12.50Fixed price | Real cost£12.50 /mo£150.00 over 12 months | See deal at Lyca Mobile (opens in a new tab) |
spusu spusu 80 Unlimited minutes · Free number transfer | Data80GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£12.90Fixed price | Real cost£12.90 /mo£154.80 over 12 months | See deal at spusu (opens in a new tab) |
Tesco Mobile 30GB | Data30GBO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£12.50£13.25 from 1 Apr 2027, then £14.04 | Real cost£13.26 /mo£318.24 over 24 months | See deal at Tesco Mobile (opens in a new tab) |
Ecotalk 30GB No price rises · Ethical Consumer Best Buy | Data30GBEE network · 5G | ContractNo contractEU roaming extra | Monthly price£14.00Fixed price | Real cost£14.00 /mo£168.00 over 12 months | See deal at Ecotalk (opens in a new tab) |
giffgaff 100GB 18 month plan No credit checks · No mid-contract price rises on 18 month contracts bought before the end of 2026 | Data100GBO2 network · 5G | Contract18 monthsEU roaming included | Monthly price£15.00Fixed price | Real cost£15.00 /mo£270.00 over 18 months | See deal at giffgaff (opens in a new tab) |
1pMobile 100GB 30-day plan 5G included, no speed caps | Data100GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£15.00Fixed price | Real cost£15.00 /mo£180.00 over 12 months | See deal at 1pMobile (opens in a new tab) |
Lebara 50GB 30-day plan No annual price rises · No credit check | Data50GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£15.00Fixed price | Real cost£15.00 /mo£180.00 over 12 months | See deal at Lebara (opens in a new tab) |
VOXI £15 plan Price locked: stays at the same monthly price · Unlimited data for social media, music and video apps | Data35GBVodafone network · 5G | ContractNo contractEU roaming extra | Monthly price£15.00Fixed price | Real cost£15.00 /mo£180.00 over 12 months | See deal at VOXI (opens in a new tab) |
EE 50GB SIM Gift data to your family · Flash sale price, ends 5 November 2026 | Data50GBEE network · 5G | Contract24 monthsEU roaming extra | Monthly price£13.00£15.50 from 31 Mar 2027, then £18.00 | Real cost£15.50 /mo£372.00 over 24 months | See deal at EE (opens in a new tab) |
Tesco Mobile 60GB | Data60GBO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£15.00£15.90 from 1 Apr 2027, then £16.85 | Real cost£15.91 /mo£381.90 over 24 months | See deal at Tesco Mobile (opens in a new tab) |
Three 120GB Lite plan Three+ Rewards · Monthly price includes a £5 discount for paying by Direct Debit | Data120GBThree network · 5G | Contract24 monthsEU roaming included | Monthly price£8.00£18.30 from 1 Apr 2027, then £20.60 | Real cost£16.30 /mo£391.20 over 24 months | See deal at Three (opens in a new tab) |
iD Mobile Unlimited 24 month plan No annual price rises · Roam in 50 destinations | DataUnlimitedThree network · 5G | Contract24 monthsEU roaming included | Monthly price£17.00Fixed price | Real cost£17.00 /mo£408.00 over 24 months | See deal at iD Mobile (opens in a new tab) |
Smarty 200GB rolling monthly Wi-Fi calling · No annual price rises | Data200GBThree network · 5G | ContractNo contractEU roaming included | Monthly price£17.00Fixed price | Real cost£17.00 /mo£204.00 over 12 months | See deal at Smarty (opens in a new tab) |
Sky Mobile 50GB Roll spare data for up to a year · Change your data plan whenever you like | Data50GBO2 network · 5G | Contract24 monthsEU roaming extra | Monthly price£17.00Fixed price | Real cost£17.00 /mo£408.00 over 24 months | See deal at Sky Mobile (opens in a new tab) |
Asda Mobile 100GB | Data100GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£18.00Fixed price | Real cost£18.00 /mo£216.00 over 12 months | See deal at Asda Mobile (opens in a new tab) |
Sky Mobile 75GB Roll spare data for up to a year · Change your data plan whenever you like | Data75GBO2 network · 5G | Contract24 monthsEU roaming extra | Monthly price£14.00£22.00 after 12 months | Real cost£18.00 /mo£432.00 over 24 months | See deal at Sky Mobile (opens in a new tab) |
Vodafone 1GB Speed: maximum download 100 Mbps | Data1GBVodafone network · 5G | Contract24 monthsEU roaming extra | Monthly price£16.00£18.50 from 1 Apr 2027, then £21.00 | Real cost£18.50 /mo£444.00 over 24 months | See deal at Vodafone (opens in a new tab) |
EE 100GB SIM Gift data to your family · Flash sale price, ends 5 November 2026 | Data100GBEE network · 5G | Contract24 monthsEU roaming extra | Monthly price£17.00£19.50 from 31 Mar 2027, then £22.00 | Real cost£19.50 /mo£468.00 over 24 months | See deal at EE (opens in a new tab) |
iD Mobile Unlimited 1 month plan No annual price rises · Roam in 50 destinations | DataUnlimitedThree network · 5G | ContractNo contractEU roaming included | Monthly price£20.00Fixed price | Real cost£20.00 /mo£240.00 over 12 months | See deal at iD Mobile (opens in a new tab) |
Smarty Unlimited rolling monthly Wi-Fi calling · No annual price rises | DataUnlimitedThree network · 5G | ContractNo contractEU roaming included | Monthly price£20.00Fixed price | Real cost£20.00 /mo£240.00 over 12 months | See deal at Smarty (opens in a new tab) |
VOXI £20 plan (3x data offer) Price locked: stays at the same monthly price · 3x data offer: 300GB instead of 100GB until 26 November 2026 | Data300GBVodafone network · 5G | ContractNo contractEU roaming extra | Monthly price£20.00Fixed price | Real cost£20.00 /mo£240.00 over 12 months | See deal at VOXI (opens in a new tab) |
1pMobile 200GB 30-day plan 5G included, no speed caps | Data200GBEE network · 5G | ContractNo contractEU roaming included | Monthly price£20.00Fixed price | Real cost£20.00 /mo£240.00 over 12 months | See deal at 1pMobile (opens in a new tab) |
Lebara 100GB 30-day plan No annual price rises · No credit check | Data100GBVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£20.00Fixed price | Real cost£20.00 /mo£240.00 over 12 months | See deal at Lebara (opens in a new tab) |
giffgaff 100GB monthly rolling No credit checks | Data100GBO2 network · 5G | ContractNo contractEU roaming included | Monthly price£20.00Fixed price | Real cost£20.00 /mo£240.00 over 12 months | See deal at giffgaff (opens in a new tab) |
Tesco Mobile 100GB | Data100GBO2 network · 5G | Contract12 monthsEU roaming included | Monthly price£20.00£21.20 from 1 Apr 2027 | Real cost£20.60 /mo£247.20 over 12 months | See deal at Tesco Mobile (opens in a new tab) |
Vodafone 5GB Speed: maximum download 100 Mbps | Data5GBVodafone network · 5G | Contract24 monthsEU roaming extra | Monthly price£19.00£21.50 from 1 Apr 2027, then £24.00 | Real cost£21.50 /mo£516.00 over 24 months | See deal at Vodafone (opens in a new tab) |
Asda Mobile Unlimited data | DataUnlimitedVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£22.00Fixed price | Real cost£22.00 /mo£264.00 over 12 months | See deal at Asda Mobile (opens in a new tab) |
Ecotalk Unlimited data No price rises · Ethical Consumer Best Buy | DataUnlimitedEE network · 5G | ContractNo contractEU roaming extra | Monthly price£22.00Fixed price | Real cost£22.00 /mo£264.00 over 12 months | See deal at Ecotalk (opens in a new tab) |
O2 100GB Classic Plan Offer price ends 4 November 2026 | Data100GBO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£20.00£22.50 from 1 Apr 2027, then £25.00 | Real cost£22.50 /mo£540.00 over 24 months | See deal at O2 (opens in a new tab) |
Sky Mobile Unlimited Roll spare data for up to a year · Change your data plan whenever you like | DataUnlimitedO2 network · 5G | Contract24 monthsEU roaming extra | Monthly price£21.00£25.00 after 12 months | Real cost£23.00 /mo£552.00 over 24 months | See deal at Sky Mobile (opens in a new tab) |
Tesco Mobile 250GB | Data250GBO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£22.50£23.85 from 1 Apr 2027, then £25.28 | Real cost£23.87 /mo£572.88 over 24 months | See deal at Tesco Mobile (opens in a new tab) |
Three Unlimited Lite plan Three+ Rewards · Monthly price includes a £5 discount for paying by Direct Debit | DataUnlimitedThree network · 5G | Contract24 monthsEU roaming included | Monthly price£22.00£24.30 from 1 Apr 2027, then £26.60 | Real cost£24.30 /mo£583.20 over 24 months | See deal at Three (opens in a new tab) |
Vodafone 30GB Speed: maximum download 100 Mbps | Data30GBVodafone network · 5G | Contract24 monthsEU roaming extra | Monthly price£22.00£24.50 from 1 Apr 2027, then £27.00 | Real cost£24.50 /mo£588.00 over 24 months | See deal at Vodafone (opens in a new tab) |
giffgaff Unlimited 18 month plan No credit checks · No mid-contract price rises on 18 month contracts bought before the end of 2026 | DataUnlimitedO2 network · 5G | Contract18 monthsEU roaming included | Monthly price£25.00Fixed price | Real cost£25.00 /mo£450.00 over 18 months | See deal at giffgaff (opens in a new tab) |
Lebara Unlimited data 30-day plan No annual price rises · No credit check | DataUnlimitedVodafone network · 5G | ContractNo contractEU roaming included | Monthly price£25.00Fixed price | Real cost£25.00 /mo£300.00 over 12 months | See deal at Lebara (opens in a new tab) |
1pMobile Unlimited data 30-day plan 5G included, no speed caps · Extra SIMs half price (£12.50) | DataUnlimitedEE network · 5G | ContractNo contractEU roaming included | Monthly price£25.00Fixed price | Real cost£25.00 /mo£300.00 over 12 months | See deal at 1pMobile (opens in a new tab) |
O2 Unlimited Classic Plan Offer price ends 4 November 2026 | DataUnlimitedO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£23.00£25.50 from 1 Apr 2027, then £28.00 | Real cost£25.50 /mo£612.00 over 24 months | See deal at O2 (opens in a new tab) |
Vodafone 100GB Speed: maximum download 100 Mbps | Data100GBVodafone network · 5G | Contract24 monthsEU roaming extra | Monthly price£24.00£26.50 from 1 Apr 2027, then £29.00 | Real cost£26.50 /mo£636.00 over 24 months | See deal at Vodafone (opens in a new tab) |
Vodafone 150GB Red | Data150GBVodafone network · 5G | Contract24 monthsEU roaming extra | Monthly price£25.00£27.50 from 1 Apr 2027, then £30.00 | Real cost£27.50 /mo£660.00 over 24 months | See deal at Vodafone (opens in a new tab) |
EE Unlimited Essentials Plus Max Gift data to your family · Unlimited data for your watch | DataUnlimitedEE network · 5G | Contract24 monthsEU roaming included | Monthly price£26.00£28.50 from 31 Mar 2027, then £31.00 | Real cost£28.50 /mo£684.00 over 24 months | See deal at EE (opens in a new tab) |
Vodafone Unlimited Plus Speed: maximum download 100 Mbps | DataUnlimitedVodafone network · 5G | Contract24 monthsEU roaming included | Monthly price£26.00£28.50 from 1 Apr 2027, then £31.00 | Real cost£28.50 /mo£684.00 over 24 months | See deal at Vodafone (opens in a new tab) |
O2 100GB Ultimate Plan Ultimate plan with 8 benefits | Data100GBO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£26.99£29.49 from 1 Apr 2027, then £31.99 | Real cost£29.49 /mo£707.76 over 24 months | See deal at O2 (opens in a new tab) |
Tesco Mobile Unlimited data | DataUnlimitedO2 network · 5G | Contract12 monthsEU roaming included | Monthly price£30.00£31.80 from 1 Apr 2027 | Real cost£30.90 /mo£370.80 over 12 months | See deal at Tesco Mobile (opens in a new tab) |
O2 Unlimited Ultimate Plan Ultimate plan with 7 benefits | DataUnlimitedO2 network · 5G | Contract24 monthsEU roaming included | Monthly price£29.99£32.49 from 1 Apr 2027, then £34.99 | Real cost£32.49 /mo£779.76 over 24 months | See deal at O2 (opens in a new tab) |
VOXI Unlimited Price locked: stays at the same monthly price | DataUnlimitedVodafone network · 5G | ContractNo contractEU roaming extra | Monthly price£35.00Fixed price | Real cost£35.00 /mo£420.00 over 12 months | See deal at VOXI (opens in a new tab) |
giffgaff Unlimited monthly rolling No credit checks | DataUnlimitedO2 network · 5G | ContractNo contractEU roaming included | Monthly price£35.00Fixed price | Real cost£35.00 /mo£420.00 over 12 months | See deal at giffgaff (opens in a new tab) |
EE Unlimited All Rounder Gift data to your family · 5G+ up to 45% faster than 5G | DataUnlimitedEE network · 5G | Contract24 monthsEU roaming included | Monthly price£33.00£35.50 from 31 Mar 2027, then £38.00 | Real cost£35.50 /mo£852.00 over 24 months | See deal at EE (opens in a new tab) |
Vodafone Unlimited Speed: maximum download 100 Mbps | DataUnlimitedVodafone network · 5G | Contract24 monthsEU roaming extra | Monthly price£35.00£37.50 from 1 Apr 2027, then £40.00 | Real cost£37.50 /mo£900.00 over 24 months | See deal at Vodafone (opens in a new tab) |
EE Unlimited Full Works Gift data to your family · 5G+ up to 45% faster than 5G | DataUnlimitedEE network · 5G | Contract24 monthsEU roaming included | Monthly price£43.00£45.50 from 31 Mar 2027, then £48.00 | Real cost£45.50 /mo£1,092.00 over 24 months | See deal at EE (opens in a new tab) |
AffiliateRanked by real cost; commission never changes the order. How we make money. Prices checked on each provider's own site on 25 Oct 2026.
Networks
Every network in the table
The big four networks and the cheaper brands that use their masts. Same coverage, often half the price.
- O2
Owned by Virgin Media O2 (a Liberty Global and Telefonica joint venture); runs its own 4G and 5G network.
4 deals · from £20.00/mo
- Vodafone
Part of VodafoneThree, the merged Vodafone and Three UK business; runs on the Vodafone network.
7 deals · from £16.00/mo
- Three
Part of VodafoneThree, the merged Vodafone and Three UK business; runs on the Three network.
3 deals · from £8.00/mo
- giffgaff
Community-run mobile brand owned by Virgin Media O2; runs on the O2 network.
8 deals · from £8.00/mo
Tesco Mobile
Tesco's mobile brand, a joint venture with Virgin Media O2; runs on the O2 network.
7 deals · from £7.50/mo
Sky Mobile
Sky's mobile brand; runs on the O2 network.
7 deals · from £1.00/mo
- Smarty
Budget SIM-only brand run by Three (Hutchison 3G UK); runs on the Three network.
6 deals · from £6.00/mo
VOXI
Vodafone's youth-focused SIM-only brand; runs on the Vodafone network.
5 deals · from £10.00/mo
- Lebara
Budget SIM-only brand with international calling; runs on the Vodafone network.
5 deals · from £5.00/mo
Lyca Mobile
International-calling pay as you go brand; runs on the EE network.
5 deals · from £3.50/mo
Asda Mobile
Asda's mobile brand; runs on the Vodafone network.
5 deals · from £5.00/mo
Talkmobile
Vodafone's value SIM-only brand; runs on the Vodafone network.
7 deals · from £4.98/mo
spusu
UK arm of the Austrian mobile brand spusu; runs on the EE network.
3 deals · from £4.90/mo
1pMobile
Low-cost SIM-only brand; runs on the EE network.
5 deals · from £5.00/mo
Ecotalk
Ethical SIM-only brand that funds nature projects; runs on the EE network.
4 deals · from £8.00/mo
Honest Mobile
Ethical SIM-only brand with Classic and Smart SIMs; does not name its host network.
How to choose
Pick your data, then the lowest real cost
Check how much data you use first: your phone's settings show the last month. Most people use under 20GB. Heavy streamers and people who tether a laptop are the ones who need unlimited.
Every UK SIM-only brand runs on one of four networks: EE, O2, Vodafone or Three. A cheaper brand on the same network gets the same masts, so check coverage for the network, not the brand.
A 30-day SIM costs a little more but lets you leave any month. A 12 or 24-month plan is cheaper up front, but most add a set price rise each April. Our real cost figure counts those rises for you.
Straight answers
SIM-only questions
- Can I keep my number when I switch?
- Yes. Text PAC to 65075 from your current phone to get your code, then give it to your new network. Your number moves in one working day.
- What does SIM-only mean?
- You keep your own phone and pay only for calls, texts and data. It is usually far cheaper than a phone contract once your phone is paid off.
- Is a cheaper network brand worse?
- Not on coverage: brands like giffgaff, Smarty and VOXI use the masts of O2, Three and Vodafone. Some cap speeds or skip extras like 5G or EU roaming, which our table shows.
- Will my SIM-only price go up?
- On many 12 and 24-month plans, yes, by a set amount each April that the network must state in pounds. 30-day plans can change price too, but you can leave at any time.