This will change the default country code for new phone numbers that are added to your Project Contacts list.
Step 1 — Click the country drop-down
Go to Company Settings > Project Settings, and click the country drop-down.
Step 2 — Select a different country
In the drop-down, click a different country.
Step 3 — Save your changes
After making your selection, click Save.
Henceforth, when you create a new project, all new phone numbers that are added to contacts will default to this country code.