About giffgaff
giffgaff is a popular SIM-only provider running on O2's network, built around flexibility and value. Its monthly 'goodybags' have no contract, so you can switch plan, pause or leave whenever you like, and unused data can roll over. Support is community-driven (with a payback scheme for helpers), and referrals earn credit. Ideal for anyone wanting low-cost, commitment-free mobile without sacrificing nationwide coverage.
Pros
- No contract — change or leave monthly
- Runs on O2's nationwide network
- Data rollover and easy plan switching
- Refer-a-friend credit
Cons
- Community-based support (not phone-first)
- No flagship handset deals like big networks
- 5G availability follows O2 coverage
Best for
Value seekers who want flexible, no-contract SIM-only deals