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

O2 logo with a SIM cardVisit O2.co.uk

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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 October 2021.

O2's best SIM only deals

The SIM only deal on O2 we rate highest this month

O2 SIM card
 
150GB data
£20
a month

24-month dealGet this deal

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

O2's 250GB for £23 plan is a good option too

O2 SIM card
 
250GB data
£23
a month

24-month dealGet this deal

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

Their £26 for unlimited data plan is a decent deal for October

O2 SIM card
 
Unlimited data
£26
a month

24-month dealGet this deal

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

To get an even bigger data allowance, we also think this £26 O2 SIM is one of their best options. It comes with unlimited data, unlimited minutes and texts on a 24‑month deal:

If you don't need your SIM to be on a provider that uses the O2 network, you can beat this deal elsewhere. But if you do, it's the cheapest unlimited data option. Here are other networks you can beat it on:

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

Maximum length: (Any)

Added features

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