Picture from HERE after the defense posted their discovery HERE.

QUESTION:  Was this picture taken of Trayvon Martin’s cell phone taken while inside a modern data forensics lab consisting of a faraday cage or “Screen Room“?

If so, this might be a big deal. If not, it’s irrelevant.

I lean toward irrelevant because it appears the phone is picking up a localized signal while the picture was being taken (note the signal strength identifier).  A properly constructed faraday cage or “screen room” would be blocking the incoming transmission signal.