I used a font called "Segoe UI Light" I edited css of flat-ui theme changed the default helvetica font into Segoe UI LIght font of global icon family in css
It works well in web but when i builded an app and using on my android phone helvetica font appears always. I also added segoe ui light.ttf in sources-webresources-files-views and i uploaded that font it didn't appears on my phone what i wanna do pls help