Edward C. Baig USA TODAY Published 1:08 PM EST Mar 6, 2019 You grab your keys, smartphone and wallet when you leave the house. Would it be such a disaster if you left that last one behind? In the not too distant future, it may not be. Your physical wallet is on borrowed time. Your phone, after all, increasingly provides the utility in digital form for the many reasons you schlep a Costanza-sized billfold in the first place, from showing off pictures to making mobile payments. Think about it. At the airport, you hand your iPhone or Android handset, rather than a paper document, to the TSA agent who inspects and scans your boarding pass. You scan your phone entering ballparks, movie theaters and concert halls, too. Start your day smarter: Get USA TODAY's Daily Briefing in your inbox Most states will accept an electronic copy of your automobile's insurance ID card during a traffic stop. Students at Duke, University of Alabama, University of Oklahoma, Temple, Johns … [Read more...] about Can I ditch my wallet for the smart wallet on my phone?