IMSI Catcher / Stingray detection and security

I am not sure how some cryptophones do it, but Ncryptocellular and GSMK/ESD cryptophones do detect both old and new types of IMSI Catchers / Stingrays (fake cell towers used by bad actors and law enforcement).

If hardware alterations are required for phones to detect stingrays, then AdGuard can't do much about it. However, if AdGuard could pioneer a way to use software-only approach to detect such devices and notify users, then it would be incredible.