Jamie had been to Madame Puddifoot's plenty of times simply because he wanted tea and not because he was on a date or anything. He hadn't really done that in school. So taking Peter to a tea shop was kind of like expressing his patriotism, though he didn't have that in spades outside of, you know, tea.
"I know," Jamie enthused, "I saw them and I was like 'I've got to get those'." But to the phone. Alright, turning it on was the first easy step. "And I'm sure you've got the screen unlock down. Have you figured out the contact list yet?" That would be the first step. Peter likely had a few numbers written down on paper and Jamie could help him input them.