1-
Keep your phone software updated for security patches.
2-
Maybe. Your phone collects data, but not necessarily to spy.
3-
Apps with permission can access location, mic, and camera.
4-
Disable location services for non-essential apps.
5-
Limit ad tracking in phone settings.
6-
Be mindful of what info you share in apps.
7-
Unfamiliar apps? Delete them!
8-
Use strong passwords and enable two-factor authentication.