If the font size of the phone is too small, you can try the following methods to enlarge it: 1 Open the phone's settings app and find the font and size options to increase the font and size. 2 You can also open a website in the browser of your phone and enlarge the font size. Usually, the browser would have some built-in font that could be adjusted to make them more eye-catching. You can also use third-party applications such as font beautification tools or font enlarging tools to adjust the font size. These applications usually have a custom option to adjust the font size to your liking.