Here are the major mobile phone networks in the UK including their green credentials.
All other mobile networks must partner with one oth these four Tier 1 mobile phone network providers
| Network | Carbon Neutral? | |
| EE | Owned by large telecommunications provider British Telecom, EE was formed in 2010. | No target |
| O2 | O2 took on its current brand name in 2002 after previously being known as Cellnet, then BT Cellnet. They are now onwned by spanish telecomunications giant Telefónica. | Net-zero by 2025 |
| Vodafone | Famous for being one of the biggest mobile communications companies in the UK for several years, Vodafone made themselves a household name sponsoring sports teams like Manchester United and the McLaren Formula 1 racing team. | Net-zero by 2050 |
| Three | Bursting onto the schene with offers surrounding the laungh of 3G in the UK, Three mobile network have always offered fantastic deals and an alternative brand voice to the often stuffy and formal approach taken by the other three Tier 1 network providers. | No Target |
Tier 2 Mobile Networks
Who do the Tier 2 mobile network suppliers purchase their services from?
The tables below contain the Tier 1 supplier and the Tier 2 mobile networks that rely on them to provide their services.
| Tier 1 | EE |
| Tier 2 | BT Mobile, Plusnet Mobile, Virgin Mobile, Utility Warehouse, Ecotalk |
| Tier 1 | O2 |
| Tier 2 | GiffGaff, Sky Mobile, Tesco Mobile |
| Tier 1 | Vodafone |
| Tier 2 | Asda Mobile, Lebara, Voxi |
| Tier 1 | Three |
| Tier 2 | ID Mobile, Smarty |