Apple iOS 17 option on only in lockdown mode for insecure 2G towers.

.. documents show the “Stingray II” device can impersonate four cellular communications towers at once, monitoring up to four cellular provider networks simultaneously, and with an add-on can operate on so-called 2G, 3G, and 4G networks simultaneously.

https://theintercept.com/2016/09/12/long-secret-stingray-man...