President Donald Trump launched a pair of fresh tariff threats via social media Friday, signaling a new 50% trade levy on import goods from the European Union could be assessed in a matter of days and a tariff of “at least 25%” on Apple iPhones manufactured outside the U.S. may also be in the works.

Apple is reportedly preparing to allow iPhone users in the EU to select third-party voice assistants to be the default, instead of Siri.