You’d hope that the highly trained astronauts on board the ISS would be good at working complex machinery. But apparently, one of the ISS’s new crew members can’t quite get the hang of a cell phone.

Tim Peake is the first-ever British astronaut on the ISS, where he’s serving as part of the crew, employed by the European Space Agency. He’s not off to a particularly auspicious start, though: after arriving safely on Tuesday and assisting with a space walk earlier this week, he couldn’t work out the telephone to call home:

It’s not all bad for Peake though: even if the machines are still confusing him, he seems to be getting the hang of weightlessness.