Research reviewed 7 October 2026. Provider terms can change after review. These links identify official starting points; they are not endorsements or referrals.
- Ofcom: switching a mobile provider
- Ofcom: mobile coverage checker
- Ofcom: contract increases
- Three official information
- O2 official information
- EE official information
- Vodafone official information
- Tesco Mobile official information
- Sky Mobile official information
- giffgaff official information
- SMARTY official information
- iD Mobile official information
- VOXI official information
- Lebara official information
- Lyca Mobile official information
- Talkmobile official information
- Asda mobile official information
- BT Mobile official information
- TalkTalk official information
- Three eSIM
- SMARTY eSIM
- giffgaff eSIM
- VOXI eSIM
- Lebara eSIM
- BT Mobile current context
- Lyca host network