Yup, what others said. If the date and time is set correctly on the camera, that data is in the photos. It's just a matter of you knowing where to look.
If your budget is $1500, why not get a 6D? It's full-frame. I used to only have a 7D and now also have a 6D. It's awesome, and now I use it most of the time even though I still have the 7D!!!!
You can only connect the smartphone when the 6D is in wifi setup mode. During the setup, there will be a time where it says "connect to phone". That's when you have to connect. Before you start using a specific phone with the camera, once the came...