As of today, what stops someone (regardless of their intentions) from building or making their own Stingray-like device?<p>Is it illegal for an &#x27;average joe&#x27; to build or develop one of these?  Or is it just super high difficulty, ie the protocols just aren&#x27;t published or [easily] reverse-engineered?  Or right now is it just the illegality of call recording entirely that is &quot;preventing&quot; it&#x27;s use?<p>Pretty sure I watched a conference talk that demoed a functional one that included pass-thru [to prevent suspicion&#x2F;non-functional devices] to the real cell tower IIRC).<p>I&#x27;m just curious because obviously this isn&#x27;t something you want just anyone to be able to build &amp; deploy -- so much potential for abuse, anything from basic identity theft to serious securities fraud, and much more quickly becomes a very serious &amp; probable threat once these become even just slightly more &quot;mainstream&quot; for the public &#x2F; criminals &#x2F; mafia &#x2F; etc...