US President Donald Trump has criticized the design of new iPhones.

Speaking to Apple CEO Tim Cook, Trump wrote, “Tim: the iPhone button was much better than a flip.” These are new iPhone models that come with no mechanical home button starting in 2017.

Trump has previously criticized the design of the iPhone. Back in 2013, he urged the company to develop a larger-screen phone model to better compete with the Samsung handset maker.

“I can’t imagine Apple not offering a larger screen iPhone. Samsung is taking their business. Steve Jobs is turning over in the grave,” Trump wrote at the time.