Shelter has been given £3m by the Vodafone UK Foundation to find new ways of giving advice to young homeless people.
The Samaritans and Youth Net have also been awarded £1.5m by the foundation to develop services for young people.
Under the three-year deal, Shelter will set up new information and advice services using mobile phones, email, print or through personal contact.
Shelter director Adam Sampson said: "With the support of the Vodafone UK Foundation we can create a programme to help us reach society's most dispossessed young people, and help them get both a permanent home and a more stable future. We also believe we can create new and better communications with young people."
The charities will also benefit from volunteering by Vodafone UK employees.
Gavin Darby, chairman of the Vodafone UK Foundation said: "We hope the partnerships will help young people to live as full a life as possible."