[rovolo]

Here's a story supporting your statement.

> But Trump wanted to be able to tweet and call people at will—neither of which is a feature of either DMCC-S device. So initially, he stuck to using his personal phone. … But he continued to resist using a secure phone for calls, because that would have meant routing those calls through the WHCA switchboard, and reportedly continued to place calls from his own Android phone from the White House residence after hours.

But, he's currently using a dedicated iPhone for twitter.

https://arstechnica.com/information-technology/2018/05/trump...