What font is used in Windows Phone UI?
The Windows Phone used the font Segeo WP which is the Windows Phone specific version of Segoe font.
About Senthil Kumar B
Senthil Kumar is a former Microsoft MVP (Most Valuable Professional). He is a Co-Author of the book "Windows 10 Development Recipes using JavaScript and CSS" for Apress Publication.
He is a technical presenter, blogger, mentor and a Geek. Senthil is a regular speaker is various local user groups. He has presented at conferences like Great Indian Developer Summit (GIDS) & Microsoft DevCamps. You can reach out to him via his Twitter handle @isenthil.