O2 Freesim
O2 Pay As You Go SIMs suit people who want to control what they spend each month without a contract. You top up with the minutes, texts and data you need, and you can change or cancel at any time. They come as either a physical plastic SIM or an eSIM, which makes them a practical second-phone or travel option.
No codes right now. We haven't confirmed a O2 Freesim code or deal yet. Follow the store and we'll email you when one lands.
By Vouchernaut Editors, updated . We may earn a commission when you shop through these links, at no extra cost to you.
O2 Freesim discount codes and deals, November 2026
A good deal is worth checking.
No current offers have been confirmed. When we confirm a O2 Freesim code or deal, it's listed here.
Check prices at O2 FreesimO2 Freesim: what to know before you buy
Choosing between a plastic SIM and an eSIM
The SIM is available as either a physical plastic card or an eSIM. A plastic SIM is the simpler choice if you plan to move one card between handsets. An eSIM suits a phone that supports it and lets you add the line without waiting for a card to arrive. Check your device manual if you are unsure which SIM size or format fits.
Keeping your existing number
If you are moving from another network, ask your current provider for a PAC code and give it to O2, and your number moves across to the new Pay As You Go SIM. If you are switching from an O2 Pay Monthly line to Pay As You Go, you can contact O2 by phone to sort the transfer.
Using a Pay As You Go SIM for travel
Roaming is one of the strongest reasons to look at this range. O2 says its Rolling plan can include international minutes to over 42 countries, and that free EU roaming is available up to 25GB within its Europe Zone. Check the current allowance before you travel, as these terms can change.
Topping up and managing your line
You add credit through MyO2, or by calling O2. Once topped up, you can use your allowance until it runs out, which keeps spending predictable. If you want a fixed monthly bill with a longer commitment instead, the Pay Monthly SIM range is the alternative to compare against.
Questions about O2 Freesim
Are there any O2 Freesim discount codes?
We don't currently list a confirmed discount code. That doesn't mean the store has no promotions; check its website for current prices.
Can I keep my number when I switch to O2 Pay As You Go?
Yes. From another network, ask your current provider for a PAC code and give it to O2, and your number transfers to the new SIM.
Can I use a Pay As You Go SIM with 5G?
Yes, 5G is available on all O2 Pay As You Go plans, but you need a 5G-ready device to use it.
Who handles my order?
You complete your purchase with the retailer. For order changes, delivery questions or a refund, contact the seller shown on your order confirmation. Vouchernaut publishes shopping guides and offers; we don't process your purchase.
Got a question about O2 Freesim?
More mobile & sim-only stores
Every mobile & sim-only store →
1pMobile
This is 1pMobile, a UK mobile network from Alton in Hampshire, part of the Telecom Plus group. You get no-contract pay-as-you-go and monthly SIM-only plans with EU roaming, and you can keep your number.
Breeze eSIM
Breeze eSIM sells data-only travel eSIMs for single countries, regions and global trips, suited to travellers with an unlocked, eSIM-compatible phone who want to keep their usual number for calls. Any live codes and deals are listed here and entered at its checkout.
Chattr
This is Chattr, a Salford-based SIM-only mobile provider that resells O2 SIMs on rolling monthly plans with no credit check. You get O2 coverage and a plan you can leave whenever you like, without a long contract.
Lebara
Lebara sells SIM-only and pay-as-you-go plans for phones you already own, on Vodafone’s network, and has long been built around calling abroad. Any live codes are listed here, each with its own terms.
Mobiles.co.uk
Mobiles.co.uk is an online-only phone shop that has been trading since the mid-1990s. It sells handsets and mobile plans, so the real decision is usually between buying a phone outright and taking one on a contract with airtime. Knowing which of those you want before you browse will save time.
Sim Local
Sim Local is an Irish travel SIM company selling eSIM plans online and in its app, and SIM cards at its airport shops, for travellers avoiding roaming charges abroad. Any live codes are listed here and entered at its checkout.
BambooSIM
BambooSIM sells data-only travel eSIMs, so there is no physical SIM to post or swap at the airport. The useful question is whether your phone supports eSIM and whether the destination you need is covered by a plan that fits your trip length.
Ecotalk
Ecotalk is a SIM-only mobile network that sends its profits towards nature restoration in Britain rather than to shareholders. It runs on a major UK network, and its plans are on rolling monthly terms. Here is what it offers, who it suits, and what to check before switching.