Would it be possible to make a free cell phone network?

Here’s the plan: Get authorization to use a some available radio band or use the same band that Wi-Fi or some other devices use. Every phone works both as a phone and a repeater, thus the phones can’t be turned off by the user. When you make a call, it is bounced from phone to phone to phone to the other phone you’re calling, completely bypassing traditional phone companies. Of course, there has to be a critical mass of such phones for such a system to work and to have reliable service.