This may sound odd but after reading your entire message several times, i keep coming up with the same inteprtation, you want us to take a photo of our cell phone using the cell phone. I'm not sure ho to do that. Possibly you could clarify.
It still amazes me the personal or incriminating info that kids send out while they are texting back and forth.
It's all done with mirrors...If you want to take a picture of your phone, that's fine with me. I can't advise you on how to do that, however.

Not sure where you get that. I'm asking for pictures taken with mobile devices, then using that same device to send me the picture. If you want to take a picture of your phone, that's fine with me. I can't advise you on how to do that, however.
FWIW, I'm not just interested in the exif data. I'm also collecting information on default file naming standards, picture quality, dimensions, etc.