100GB+ SIM-only deals

Big allowances without paying for unlimited — every SIM with 100GB or more, cheapest first.
79 deals, cheapest first
Talkmobile
Talkmobile
Uses VodafoneThree masts
12-month contract
100GB Data5G
Unlimited minutes & texts
No price risesEU roaming includedeSIM availableWi-Fi calling included
Important to know
  • −Unused data does not roll over to the next month
  • −The link opens Talkmobile's full offers page — choose the 100GB plan there
£4.98/mo
for the first 3 months
  • Then £9.95 a month after that
  • £104.49 total over 12 months
  • Average over 12 months: £8.71 a month
  • £0 upfront · no cashback required
Get this deal from Talkmobile*
Talkmobile
Talkmobile
Uses VodafoneThree masts
12-month contract
150GB Data5G
Unlimited minutes & texts
No price risesEU roaming includedeSIM availableWi-Fi calling included
Important to know
  • −Unused data does not roll over to the next month
  • −The link opens Talkmobile's full offers page — choose the 150GB plan there
£5.97/mo
for the first 3 months
  • Then £11.95 a month after that
  • £125.46 total over 12 months
  • Average over 12 months: £10.46 a month
  • £0 upfront · no cashback required
Get this deal from Talkmobile*
Vodafone
Vodafone
Uses Vodafone network
12-month contract
100GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: Zone A roaming is included on all pay monthly plans, but wider European roaming needs a Plus or Premier plan…
£12.00/mo
until 31 March 2027
  • Then £14.50 a month from 1 April 2027
  • £154.00 total over 12 months
  • £10.00 cashback via buymobiles
  • Average after cashback: £12.00 a month
  • £0 upfront
Get this deal from buymobiles*
Lycamobile
Lycamobile
Uses EE masts
24-month contract
100GB Data5G
Unlimited minutes & texts
No price riseseSIM availableWi-Fi calling included100 international mins
Important to know
  • ⚠EU roaming is included at no extra cost in most bundles, but not on every plan.
  • −Unused data does not roll over to the next month
£6.00/mo
for the first 6 months
  • Then £12.00 a month after that
  • £252.00 total over 24 months
  • Average over 24 months: £10.50 a month
  • £0 upfront · no cashback required
Get this deal from Lycamobile*
Vodafone
Vodafone
Uses Vodafone network
24-month contract
120GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: Zone A roaming is included on all pay monthly plans, but wider European roaming needs a Plus or Premier plan…
£13.00/mo
until 31 March 2027
  • Then £15.50 a month from 1 April 2027 until 31 March 2028
  • Then £18.00 a month from 1 April 2028
  • £362.00 total over 24 months
  • £80.00 cashback via buymobiles
  • Average after cashback: £11.75 a month
  • £0 upfront
Get this deal from buymobiles*
Vodafone
Vodafone
Uses Vodafone network
24-month contract
200GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: Zone A roaming is included on all pay monthly plans, but wider European roaming needs a Plus or Premier plan…
£15.00/mo
until 31 March 2027
  • Then £17.50 a month from 1 April 2027 until 31 March 2028
  • Then £20.00 a month from 1 April 2028
  • £410.00 total over 24 months
  • £80.00 cashback via buymobiles
  • Average after cashback: £13.75 a month
  • £0 upfront
Get this deal from buymobiles*
VOXI
VOXI
Uses VodafoneThree masts
monthly rolling
140GB Data5G
Unlimited minutes & texts
Endless social, music & video streamingNo price riseseSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming is not included — you need to buy a European Roaming Pass first (priced at checkout).
  • −Unused data does not roll over to the next month
  • −The link opens VOXI's full plans page — choose the 140GB plan there
£15.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from VOXI*
Lycamobile
Lycamobile
Uses EE masts
24-month contract
120GB Data5G
Unlimited minutes & texts
No price riseseSIM availableWi-Fi calling included100 international mins
Important to know
  • ⚠EU roaming is included at no extra cost in most bundles, but not on every plan.
  • −Unused data does not roll over to the next month
£8.00/mo
for the first 6 months
  • Then £16.00 a month after that
  • £336.00 total over 24 months
  • Average over 24 months: £14.00 a month
  • £0 upfront · no cashback required
Get this deal from Lycamobile*
Ecotalk
Ecotalk
Uses EE masts
monthly rolling
100GB Data5G
Unlimited minutes & texts
No price riseseSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: £2 per day
  • −Unused data does not roll over to the next month
£18.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from Ecotalk*
Lebara
Lebara
Uses VodafoneThree masts
12-month contract
100GB Data5G
Voucher dealNo price risesEU roaming includedeSIM available
Important to know
  • ⚠You must enter the code LEBARA3M at Lebara's checkout to get the intro price — without it you pay £18.00 a month from the start
  • −Unused data does not roll over to the next month
£9.00/mo
for the first 3 months with code LEBARA3M
  • Then £18.00 a month after that
  • £189.00 total over 12 months
  • Average over 12 months: £15.75 a month
  • £0 upfront · no cashback required
Get this deal from Lebara*
Lycamobile
Lycamobile
Uses EE masts
12-month contract
120GB Data5G
Unlimited minutes & texts
No price riseseSIM availableWi-Fi calling included100 international mins
Important to know
  • ⚠EU roaming is included at no extra cost in most bundles, but not on every plan.
  • −Unused data does not roll over to the next month
£9.00/mo
for the first 3 months
  • Then £18.00 a month after that
  • £189.00 total over 12 months
  • Average over 12 months: £15.75 a month
  • £0 upfront · no cashback required
Get this deal from Lycamobile*
VOXI
VOXI
Uses VodafoneThree masts
monthly rolling
300GB Data5G
Unlimited minutes & texts
No price riseseSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming is not included — you need to buy a European Roaming Pass first (priced at checkout).
  • −Unused data does not roll over to the next month
£20.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from buymobiles*
Lebara
Lebara
Uses VodafoneThree masts
monthly rolling
100GB Data5G
Voucher dealNo price risesEU roaming includedeSIM available
Important to know
  • ⚠You must enter the code LEBARA3M at Lebara's checkout to get the intro price — without it you pay £20.00 a month from the start
  • −Unused data does not roll over to the next month
£10.00/mo
for the first 3 months with code LEBARA3M
  • Then £20.00 a month after that
  • Monthly rolling — cancel or change any time
  • Average over your first 12 months: £17.50 a month
  • £0 upfront · no contract tying you to future price changes
Get this deal from Lebara*
Lycamobile
Lycamobile
Uses EE masts
monthly rolling
120GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included100 international mins
Important to know
  • ⚠EU roaming is included at no extra cost in most bundles, but not on every plan.
  • −Unused data does not roll over to the next month
£10.00/mo
for the first month
  • Then £20.00 a month after that
  • Monthly rolling — cancel or change any time
  • Average over your first 12 months: £19.17 a month
  • £0 upfront · no contract tying you to future price changes
Get this deal from Lycamobile*
NOW Mobile
NOW Mobile
Uses EE masts
monthly rolling
100GB Data5G
Unlimited minutes & texts
No price risesWi-Fi calling included
Important to know
  • ⚠EU roaming: Some plans come with free EU roaming, but it is not stated as included on all plans.
  • −Unused data does not roll over to the next month
£20.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from NOW Mobile
O2
O2
Uses O2 network
24-month contract
100GB Data5G
Unlimited minutes & texts
EU roaming includedeSIM availableWi-Fi calling included
£20.00/mo
until 31 March 2027
  • Then £22.50 a month from 1 April 2027 until 31 March 2028
  • Then £25.00 a month from 1 April 2028
  • £530.00 total over 24 months
  • Average over 24 months: £22.08 a month
  • £0 upfront · no cashback required
Get this deal from O2
EE
EE
Uses EE network
24-month contract
100GB Data5G
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: A daily charge applies to use allowances in the EU/EEA on standard plans, while Essentials Plus, All Rounder…
  • −Unused data does not roll over to the next month
£21.00/mo
until 28 February 2027
  • Then £23.50 a month from 1 March 2027 until 28 February 2028
  • Then £26.00 a month from 1 March 2028
  • £559.00 total over 24 months
  • Average over 24 months: £23.29 a month
  • £0 upfront · no cashback required
Get this deal from EE
NOW Mobile
NOW Mobile
Uses EE masts
monthly rolling
150GB Data5G
Unlimited minutes & texts
No price risesWi-Fi calling included
Important to know
  • ⚠EU roaming: Some plans come with free EU roaming, but it is not stated as included on all plans.
  • −Unused data does not roll over to the next month
£25.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from NOW Mobile
ParentShield
ParentShield
Uses EE masts
monthly rolling
100GB Data
Unlimited minutes & texts
No price rises
Important to know
  • ⚠EU roaming is not included — EU roaming works on Roam Stage plans but is pay-per-use (zone charges), not inclusive.
  • −Unused data does not roll over to the next month
£29.99/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from ParentShield
Vodafone
Vodafone
Uses Vodafone network
monthly rolling
150GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: Zone A roaming is included on all pay monthly plans, but wider European roaming needs a Plus or Premier plan…
£30.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
300GB for first 3 months
Get this deal from Vodafone*
NOW Mobile
NOW Mobile
Uses EE masts
monthly rolling
200GB Data5G
Unlimited minutes & texts
No price risesWi-Fi calling included
Important to know
  • ⚠EU roaming: Some plans come with free EU roaming, but it is not stated as included on all plans.
  • −Unused data does not roll over to the next month
£35.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from NOW Mobile
Show 13 more deals — each beaten on price or data by one above
VOXI
VOXI
Uses VodafoneThree masts
monthly rolling
100GB Data5G
Unlimited minutes & texts
Endless social, music & video streamingNo price riseseSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming is not included — you need to buy a European Roaming Pass first (priced at checkout).
  • −Unused data does not roll over to the next month
  • −The link opens VOXI's full plans page — choose the 100GB plan there
£20.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from VOXI*
Vodafone
Vodafone
Uses Vodafone network
24-month contract
100GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: Zone A roaming is included on all pay monthly plans, but wider European roaming needs a Plus or Premier plan…
£24.00/mo
until 31 March 2027
  • Then £26.50 a month from 1 April 2027 until 31 March 2028
  • Then £29.00 a month from 1 April 2028
  • £626.00 total over 24 months
  • Average over 24 months: £26.08 a month
  • £0 upfront · no cashback required
Get this deal from Vodafone*
Vodafone
Vodafone
Uses Vodafone network
24-month contract
150GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: Zone A roaming is included on all pay monthly plans, but wider European roaming needs a Plus or Premier plan…
£25.00/mo
until 31 March 2027
  • Then £27.50 a month from 1 April 2027 until 31 March 2028
  • Then £30.00 a month from 1 April 2028
  • £650.00 total over 24 months
  • Average over 24 months: £27.08 a month
  • £0 upfront · no cashback required
Get this deal from Vodafone*
Vodafone
Vodafone
Uses Vodafone network
monthly rolling
120GB Data5G
Unlimited minutes & texts
eSIM availableWi-Fi calling included
Important to know
  • ⚠EU roaming: Zone A roaming is included on all pay monthly plans, but wider European roaming needs a Plus or Premier plan…
£37.00/mo
cancel or change any time
  • £0 upfront · no contract tying you to future price changes
Get this deal from Vodafone*
Want to pay from your bank? See the rolling SIMs you can pay by Direct Debit →

Monthly prices are each provider’s current cost, checked against their site — last updated 8 August 2026. Links marked * earn us a commission if you buy — it never changes what you pay, and it plays no part in how we rank deals.