I have to navigate my city’s public transit system every day, so mobile internet has been a game changer for me personally. Thanks to that I’m able to check live arrivals and see which station it makes more sense to walk to in my neighborhood, or figure out exactly when where to switch lines (also based on live arrival times), etc.

Having access to streaming music doesn’t hurt, either. IMO it really just comes down to not installing dopamine slot machines (e.g., basically any social media). Keep the thing simple and utilitarian