How difficult is to make a 3g proxy, something like the Stingray? https://en.m.wikipedia.org/wiki/Stingray_phone_tracker https://en.m.wikipedia.org/wiki/Stingr

How difficult is to make a 3g proxy, something like the Stingray? https://en.m.wikipedia.org/wiki/Stingray_phone_tracker https://en.m.wikipedia.org/wiki/Stingray_phone_tracker