Mobile phone and smoke detector

This is just the weirdest. Not three minutes ago my Norwegian mobile phone that I haven’t had turned on since christmas suddenly turned itself on, and just a second thereafter my smoke alarm went bananas. I can smell no smoke, no smoke outside, no smoke in the entrance, not anywhere. What’s going on? Normally I would just assume it malfunctioned, but my mobile phone turned itself on! It shouldn’t be able to do that??