Why isn't Trump only using the self-destructing phone Obama had?

Over the past few days, some of the biggest questions about our national cybersecurity have centered on one device: President Donald Trump's phone.  Shortly after he reportedly traded in his main Twitter machine, an old-model, unsecured Android phone, for a "secure, encrypted device approved by the Secret Service," the famously tech averse executive appeared to still be using the unsecured device. This made waves in intelligence and security circles, as the risks of the president of the Uni