Unlimited data SIM only deals
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Prices correct as of September 2026. We may earn commission when you click through — this never affects our rankings.
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iD Mobile
4.34.3 (70000)
Uses Three network
No price riseData rollover5G
Data
Unlimited
Calls
Unlimited
Texts
Unlimited
Contract
SIM only
Rolling
£15.00/mo
Unlimited · SIM only
Unlimited calls & texts
No price riseData rollover5G
Continue on iD Mobile
✓ Roll over unused data✓ No roaming charges in EU✓ No price rises mid-contract
SM
Smarty
4.04.0 (48000)
Uses Three network
No price riseData refund
Data
Unlimited
Calls
Unlimited
Texts
Unlimited
Contract
SIM only
Rolling
£17.00/mo
Unlimited · SIM only
Unlimited calls & texts
No price riseData refund
Continue on Smarty
✓ No annual price rises✓ Unused data refunded✓ EU roaming included✓ No Credit Checks, Data Roaming
giffgaff
3.93.9 (30000)
Uses O2 network
No price riseEU roaming
Data
Unlimited
Calls
Unlimited
Texts
Unlimited
Contract
SIM only
Rolling
£20.00/mo
Unlimited · SIM only
Unlimited calls & texts
No price riseEU roaming
Continue on giffgaff
✓ No contract✓ EU roaming included✓ Free SIM delivery
AM
Asda Mobile
3.73.7 (17000)
Uses Vodafone network
No contractNo price rise5G
Data
Unlimited
Calls
Unlimited
Texts
Unlimited
Contract
SIM only
Rolling
£22.00/mo
Unlimited · SIM only
Unlimited calls & texts
No contractNo price rise5G
Continue on Asda Mobile
✓ No contract✓ Free SIM✓ Rewards with Asda shopping
LB
Lebara
4.84.8 (78000)
Uses Vodafone network
EU roamingInternational calls5G
Data
Unlimited
Calls
Unlimited
Texts
Unlimited
Contract
SIM only
Rolling
£25.00/mo
Unlimited · SIM only
Unlimited calls & texts
EU roamingInternational calls5G
Continue on Lebara
✓ International minutes included✓ EU roaming included✓ No credit check
VOXI
3.23.2 (23000)
Uses Vodafone network
No price rise5G ready
Data
Unlimited
Calls
Unlimited
Texts
Unlimited
Contract
SIM only
Rolling
£30.00/mo
Unlimited · SIM only
Unlimited calls & texts
No price rise5G ready
Continue on VOXI
✓ Endless social media✓ Endless video streaming✓ 5G at no extra cost
O2
O2 network
O2 PriorityEU roaming
Data
Unlimited
Calls
Unlimited
Texts
Unlimited
Contract
SIM only
Rolling
£38.00/mo
Unlimited · SIM only
Unlimited calls & texts
O2 PriorityEU roaming
Continue on O2
✓ O2 Priority rewards✓ EU roaming included✓ 5G at no extra cost