If you have a Samsung, open the camera and tap the screen. That will bring up the flash.
Is this for the non-reveal dark audit shops? I was thinking of taking some of the shops but I can't seem to get decent night shots. How many photos do they need?
Thanks to everyone who has posted a response to my question. I did some of these last night and they worked out ok. I did discover that with my Android phone I can reduce the exposure "on the fly" and get rid of most of the glare. The flash does help on some shots.