When did you last switch your phone off?

Tomorrow I will be spending the day with my boy, having fun, getting wet and muddy. My phone, I want to take it with me to take photos and video. Our phones are now so integrated into our lives we cannot just leave them behind. Or can we? My phone will be switched on, with no SIM card in it, I will take photos, I will video our day out, without the fear of a phone call to spoil it. I can only see one spanner in the works on the horizon... will my son feel the same and leave his SIM out of his phone?