You know how 911 works without a valid cell plan? Hypothetically, in the event of a war or similar unrest, the US could use satellite cell 'towers' to give an

You know how 911 works without a valid cell plan? Hypothetically, in the event of a war or similar unrest, the US could use satellite cell 'towers' to give an entire country limited connectivity with old devices people have stashed away in some drawer or closet without otherwise active cell plans, which are therefore off the local government's radar. People could be coerced to turn over the phones the government knows about but still retain some connectivity.