For sure - and you can use WiFi only, set yourself up with a HaLow rig and give yourself a ~10mbps connection anywhere up to 10 miles from your home, suitable for voip and low rate streaming, throw in VPN, and remain completely off-net as far as cellular networks go. I'm actually planning on using a wireless touchscreen and mobile halow/raspberry pi network/storage stack to completely replace my phone, but the bigger issue is automated tracking of everything - if you're the only blank spot in a sea of known individuals, it's just a matter of seconds to id you, since everything everywhere about everyone is tracked online.

We should be enforcing informed consent regulation of network infrastructure, treating privacy and anonymity as synonymous with liberty and freedom. Allowing the system to operate as it does is a choice; those with lots of money get to make it grow by exploiting a constant invasion of privacy with no concurrent return to the society being exploited.

Phones aren't built to be privacy respecting, and kill switches are a mitigation of a symptom, they don't do anything to address the disease.