Politico reports that  Trump uses an iPhone which isn't equipped with sophisticated security features designed to shield his communications." The decision is "a departure from the practice of his predecessors that potentially exposes him to hacking or surveillance".

The president uses at least two iPhones, according to one of the officials. One phone is capable only of making calls, the other is equipped only with the Twitter app and preloaded with a handful of news sites -  issued by White House Information Technology and the White House Communications Agency, an office staffed by military personnel that oversees White House telecommunications.

While aides have urged the president to swap out the Twitter phone on a monthly basis, Trump has resisted their entreaties, telling them it was "too inconvenient", the same administration official said.

The president has gone as long as five months without having the phone checked by security experts. It is unclear how often Trump's call-capable phones, which are essentially used as burner phones, are swapped out.

We are unsure if Trump does this because he believes that the team that can't programme a clock is more capable than Homeland Security at making a phone secure, or he just can't be bothered with the red security tape. 

Trump once clamed he used both iPhones and  Samsung devices. He once threatened that if Apple didn't give info to authorities on the terrorists he'd only be using Samsung until it gave info.  Apple didn't and he appears to have got rid of the Samsung.