And what apps do you use/how often are you on your phone?

I seem to use a whole lot more data than my husband. I use social media but he doesn't. I'm guessing that's where the majority of the data usage is coming from? Facebook and Instagram? I don't stream music or movies. Sometimes I'll watch a video on Instagram. Last month I used 11GB data just on my phone. And again, I don't stream music or youtube stuff or anything!