Customers in the UK, Ireland, Germany, Italy and Spain will be able to buy the Fairphone 3 from later this year, as Vodafone attempts to show off its green credentials.
Fairphone, founded in the Netherlands in 2013, says its Android phone is ethically produced to ensure that workers, from the metal miners, to manufacturers and office staff, are properly treated and paid a decent wage.
The phone is also built in such as way that upgrades and repairs are easier, to ensure less electrical waste ends up in landfill, and the need to replace handsets is removed.
The deal with Vodafone will allow the two companies to collaborate on best practice and share knowledge on industry sustainability issues including electronic waste and responsible sourcing.
Bosses at Vodafone said it will help it achieve its commitment to cut its carbon footprint in half and buy all its electricity from renewable sources by 2025.
The company has also vowed to re-use, re-sell or recycle 100% of its network waste and help customers extend the lives of the devices they already own.
Vodafone Group chief commercial operations and strategy officer Ahmed Essam said: "This strategic partnership between Vodafone and Fairphone brings together our expertise as Europe's leading and largest converged technology communications company with the recognised expert in sustainable smartphones."
Fairphone chief executive Eva Gouwens said: "Working with a large operator such as Vodafone helps to bring sustainable electronics to the mainstream market and therefore this is one of the strongest signals we can send to the rest of the industry."