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O2 SIM only deals: comparing their best plans in January

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We look at whether O2's current best SIM only plans are decent value compared to all their competitor mobile networks in the UK. SIM Sherpa is your trusty guide. Last updated: 14th January 2022.

O2's best SIM only deals

This month's overall best O2 SIM only deal

O2 SIM card
 
Unlimited data
£30
a month

24-month dealGet this deal

at o2.co.uk
(opens in new window)

We'd say the best SIM only plan O2 are selling this January is their 24‑month unlimited data deal below, which comes in at £30 a month and includes unlimited minutes and texts too:

It's definitely one of O2's best. But it's not market-leading. You can get a similar plan on other providers for less, even if you need your SIM to use the O2 network. Here are other networks you can beat it on:

O2's £20 for 150GB is our next best choice now

O2 SIM card
 
150GB data
£20
a month

24-month dealGet this deal

at o2.co.uk
(opens in new window)

Their £18 SIM with 60GB is our next favourite this January

O2 SIM card
 
60GB data
£18
a month

24-month dealGet this deal

at o2.co.uk
(opens in new window)

If that'd be too much data for you, you might like the £18 SIM only deal running on O2 at the moment. It's a 24‑month plan, which comes with 60GB data, unlimited minutes and texts too:

While this is a good enough deal to make it into the best of O2's SIMs, you can beat it for price (even if you definitely want a provider that uses the O2 network). Here's which other networks can beat it:

Compare all SIM only plans

Compare deals from all networks

How O2's deals compare with other networks

SIM card with magnifying glass

Networks

Providers:

Three logo
ASDA logo
BT Mobile logo
EE logo
giffgaff logo
Honest logo
ID logo
IQ logo
Lebara logo
O2 logo
Plusnet logo
Sky logo
SMARTY logo
Talkmobile logo
Tesco logo
Virgin Mobile logo
Vodafone logo
VOXI logo

Plan

Data: (0MB+)

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Contract

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