Smartphones are the obvious must-have tech gadgets in 2023. More than 85% of us have one. We use it for several hours a day for just about everything from texting, talking and taking photos or videos to shopping, working, social media-ing and so much more. Still, are we getting the most out of our magical little do-everything devices? Probably not. Gadget-makers add handy new tricks all the time. For example, did you know that many smartphones now come with a built-in white noise machine? I didn’t, until I happened upon the feature buried in my accessibility settings a few days…