Ranked by true cost

SIM only & pay as you go

Already got a handset you are happy with? A SIM-only plan is almost always cheaper. Rolling 30-day plans and pay-as-you-go bundles let you leave whenever you like.

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208 deals match your filters. Prices last checked 29 October 2026.

O2O2
O2 SIM Only on Mini 20GB (1 Month contract) with Unlimited …
SIM only
Data20GB
MinutesUnlimited
TextsUnlimited
TermRolling
5G 6 months Free Disney+ O2 Priority Charge to mobile Recommend a Friend and Earn Rewards
SIM onlyRolling
£27.00/mo
No contract — leave any month.
See deal at O2
O2O2
O2 SIM Only on Ultimate 20GB (24 Month contract) with Unlim…
SIM only
Data20GB
MinutesUnlimited
TextsUnlimited
Term24 mths
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only24 months
£27.99/mo
£27.99 × 24£671.76
See deal at O2
O2O2
O2 SIM Only on Ultimate 3GB (12 Month contract) with Unlimi…
SIM only
Data3GB
MinutesUnlimited
TextsUnlimited
Term12 mths
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only12 months
£27.99/mo
£27.99 × 12£335.88
See deal at O2
O2O2
O2 SIM Only on Ultimate 20GB (24 Month contract) with 100 t…
SIM only
Data20GB
MinutesUnlimited
Texts100
Term24 mths
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only24 months
£27.99/mo
£27.99 × 24£671.76
See deal at O2
O2O2
O2 SIM Only on Ultimate 3GB (12 Month contract) with 100 te…
SIM only
Data3GB
MinutesUnlimited
Texts100
Term12 mths
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only12 months
£27.99/mo
£27.99 × 12£335.88
See deal at O2
O2O2
O2 SIM Only on Classic (12 Month contract) with Unlimited m…
SIM only
Data100GB
MinutesUnlimited
TextsUnlimited
Term12 mths
5G 3 months Free Disney+ O2 Priority Charge to mobile Recommend a Friend and Earn Rewards
SIM only12 months
£28.00/mo
£28.00 × 12£336
See deal at O2
O2O2
O2 SIM Only on Classic 100GB (12 Month contract) with 100 t…
SIM only
Data100GB
MinutesUnlimited
Texts100
Term12 mths
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards 5G-ready
SIM only12 months
£28.00/mo
£28.00 × 12£336
See deal at O2
MoMozillion
Runs on EE
Mozillion SIM only
SIM only
Data150GB
MinutesUnlimited
TextsUnlimited
Term24 mths
SIM only24 months
£14.00/mo
£14.00 × 24£672
See deal at Mozillion
MoMozillion
Runs on EE
Mozillion SIM only
SIM only
Data150GB
MinutesUnlimited
TextsUnlimited
Term12 mths
SIM only12 months
£14.50/mo
£14.50 × 12£348
See deal at Mozillion
LeLebara
Runs on Vodafone
12 Month Plan Unlimited 2
SIM only
DataUnlimited
MinutesUnlimited
TextsUnlimited
Term12 mths
Unlimited data 5G
SIM only12 months
£27.00/mo
£27.00 × 12£351
See deal at Lebara
O2O2
O2 SIM Only on Plus 100GB (12 Month contract) with Unlimite…
SIM only
Data100GB
MinutesUnlimited
TextsUnlimited
Term12 mths
5G 6 months Free Disney+ O2 Priority Charge to mobile Recommend a Friend and Earn Rewards
SIM only12 months
£29.99/mo
£29.99 × 12£359.88
See deal at O2
O2O2
O2 SIM Only on Plus 100GB (12 Month contract) with 100 text…
SIM only
Data100GB
MinutesUnlimited
Texts100
Term12 mths
5G 6 months Free Disney+ O2 Priority Charge to mobile Recommend a Friend and Earn Rewards
SIM only12 months
£29.99/mo
£29.99 × 12£359.88
See deal at O2
O2O2
O2 SIM Only on Ultimate Unlimited (24 Month contract) with …
SIM only
DataUnlimited
MinutesUnlimited
TextsUnlimited
Term24 mths
Unlimited data 5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only24 months
£29.99/mo
£29.99 × 24£719.76
See deal at O2
O2O2
O2 SIM Only on Ultimate Unlimited (24 Month contract) with …
SIM only
DataUnlimited
MinutesUnlimited
Texts100
Term24 mths
Unlimited data 5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only24 months
£29.99/mo
£29.99 × 24£719.76
See deal at O2
LeLebara
Runs on Vodafone
SIM Only 50GB
SIM only
Data50GB
MinutesUnlimited
TextsUnlimited
TermRolling
5G
SIM onlyRolling
£15.00/mo
No contract — leave any month.
See deal at Lebara
MoMozillion
Runs on EE
Mozillion SIM only
SIM only
Data150GB
MinutesUnlimited
TextsUnlimited
TermRolling
SIM onlyRolling
£15.00/mo
No contract — leave any month.
See deal at Mozillion
MoMozillion
Runs on EE
Mozillion SIM only
SIM only
Data210GB
MinutesUnlimited
TextsUnlimited
Term24 mths
SIM only24 months
£15.00/mo
£15.00 × 24£720
See deal at Mozillion
O2O2
O2 SIM Only on Ultimate 20GB (12 Month contract) with Unlim…
SIM only
Data20GB
MinutesUnlimited
TextsUnlimited
Term12 mths
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only12 months
£30.99/mo
£30.99 × 12£371.88
See deal at O2
O2O2
O2 SIM Only on Ultimate 20GB (12 Month contract) with 100 t…
SIM only
Data20GB
MinutesUnlimited
Texts100
Term12 mths
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards Data Rollover
SIM only12 months
£30.99/mo
£30.99 × 12£371.88
See deal at O2
O2O2
O2 SIM Only on Mini 100GB (1 Month contract) with 100 texts…
SIM only
Data100GB
MinutesUnlimited
Texts100
TermRolling
5G O2 Priority Charge to mobile Recommend a Friend and Earn Rewards 5G-ready
SIM onlyRolling
£31.00/mo
No contract — leave any month.
See deal at O2