Weston Spirit, the charity launched by Falklands hero Simon Weston, has won a three-year partnership with mobile phone company O2 that is expected to be worth £1m.
The company will provide project funding, cause-related marketing and employee fundraising. The charity will also train 200 O2 staff as mentors to young people.
The telecoms firm approached the charity, which works with disadvantaged young people after the charity was runner-up in a pitch for a partnership with O2's European sister company last year, said Weston Spirit appeals director Nick van Breemen.
"O2 were looking for a charity that had values consistent with theirs - a charity with fresh thinking that could deliver a mobile technology project to young people," he added.