I'm quite new to web development for mobile devices, mostly used to developping for desktop screens. I'm currently writing again a website code to make it responsive with Bootstrap 3. I have issues with font sizes that are very small once on a mobile phone screen whereas they are good on my desktop computer screen (see image below for a Samsung xcover3 screen : 480x800).
Is there a way to make it better without making font sizes bigger? This solution would produce extremely large font sizes on desktop screens, which is not satisfying either...