That can not happen. Cellular data is not another dumb pipe, it's data transmission grafted with duct tape onto GSM et al., which are ridiculously centralized

That can not happen. Cellular data is not another dumb pipe, it's data transmission grafted with duct tape onto GSM et al., which are ridiculously centralized and proprietary services. There are no open source implementations, no open source hardware, certainly no open source drivers. Even if there were, you would be at the mercy of whoever operates the base station.