There’s only one non-corporate option when it comes to telephony (including mobile, landline and broadband), at the moment:
the Phone Co-op
Just like other contracts, but owned by its members – you can be a customer and/or a member.
NB: it’s not possible to get a smartphone that’s made by a co-op yet. The Fairphone comes closest (and is provided by the Phone Co-op), but it’s still a private company that could either be bought out by a conventional, for-profit corporation, or become one itself. See more of a discussion on this here. However, a co-operative in Indonesia is providing a ‘locally-produced, low-end smartphone for Indonesians left out of the digital boom’. It’s only a matter of time before you’ll be able to get a co-operative smartphone over here. Watch this space.