EM,
Are you saying that it was not NOTAM'd as active but a NOTAM came alive when you were already in the air? If so I think (given the following events) that it was unlucky that you had mobile internet at that point to give you that update. I also want to put to you in case you hadn't thought of it before, if you had have departed after seeing no NOTAMs to affect, and had not have had Skydemon (or alternative) with you, what would have happened differently?