O2 SIM Only 40GB 5G Deal with Unlimited Calls & Texts for £8pm

O2 SIM Only plan offers 40GB data (80GB with Volt), unlimited minutes and texts, EU roaming, and O2 Priority benefits for £8 per month on a 12-month contract, with an existing customer workaround mentioned. This mid-range 5G SIM deal is suitable for regular data users who want extra perks and flexibility. No voucher is required; simply select the plan on the O2 website and complete signup online. No screenshot is required for this deal.