AT&T believes its network wasn’t at fault for a conference call where President Donald Trump accused the company of being “totally unable to make their equipment work properly.” Instead, AT&T is blaming an unnamed “conference call platform.”

President Donald Trump’s couldn’t join a conference call, and it caused him to publicly lambast AT&T. The president was meant to speak with “tens of thousands of people” and faith leaders from across the nation Monday afternoon, but was unable to join the call due to technical issues.