Best SIM Only Deals from O2 & giffgaff(01)

Best SIM Only Deals from O2 & giffgaff(01)


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O2 Sim Only - 150GB Data, Unlimited Mins & Texts + 12 Months FREE Best SIM Only Deals from O2 & giffgaff The best O2 SIM only deals and plans in October 2025 TechRadar