Most modern phones are made of materials on which pathogens, Covid-19 included, can survive on for up to 120 hours. Accordingly, bodies such as the US Center for Disease Control (CDC) recommend that they be cleaned once a day. New research suggests that up to 44% of users do so now, compared to about half this number prior to the pandemic.
https://www.notebookcheck.net/The-number-of-people-who-clean-their-phones-in-the-US-may-have-doubled-due-to-Covid-19.466941.0.html