Experiencing the exact same thing. 24/7 addicted to her phone, whether it's on social media, checking Instagram, Facebook, all the messaging apps etc. or playing games, reading the news, reading stories, etc.
I do give her shit for doing so, sometimes I take her phone away
We do talk a lot and have a perfectly good social life with each other, but sometimes on important dates or important event where I'd rather she completely submit herself to the event at hand, she isn't really "present" so to speak...