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O2 SIM only deals: comparing their best monthly plans in December

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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: 1st December 2021.

O2's best SIM only deals

The SIM only deal on O2 we rate highest this month

O2 SIM card
 
Unlimited data
£25
a month

24-month dealGet this deal

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

We'd say O2's £25 SIM only plan below is their best option this December. It's on a 24‑month deal and gets you unlimited data, unlimited minutes and texts:

It might be one of O2's best deals on SIM only but you can get a lower price for a similar plan on other providers, even ones that use the O2 network. Here's which other networks can beat it:

O2's 250GB for £20 plan is a good option too

O2 SIM card
 
250GB data
£20
a month

24-month dealGet this deal

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

Their £16 for 60GB plan is a decent deal for December

O2 SIM card
 
60GB data
£16
a month

24-month dealGet this deal

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

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+)

Minutes: (0+)

Contract

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