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

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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: 15th September 2021.

O2's best SIM only deals

The best overall O2 SIM only deal this month

O2 SIM card
 
120GB data
£20
a month

24-month dealGet this deal

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

O2's 60GB for £18 plan is a good option too

O2 SIM card
 
60GB data
£18
a month

24-month dealGet this deal

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

Their £16 for 25GB plan is a decent deal for September

O2 SIM card
 
25GB data
£16
a month

24-month dealGet this deal

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

If you need less data, another good deal on O2 at the moment is their £16 SIM only plan here, which includes 25GB data instead, plus unlimited minutes and texts:

It's a good enough deal to get into O2's best SIMs but you can actually get a lower price for a similar plan elsewhere, even if you definitely want it to use the O2 network. See where you can get it for less here:

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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