giffgaff vs O2
giffgaff and O2 compared side by side in United Kingdom.
giffgaff vs O2 — who's best for whom
giffgaff
O2 Priority perks and direct operator relationship. giffgaff vs O2: giffgaff uses O2's network at lower prices. O2 direct gives Priority rewards.
O2
Budget O2-network SIM. O2 vs giffgaff: giffgaff runs on the O2 network at a lower price point. For O2 Priority perks, stay on O2 directly.