this is big issue now for me .
callers name too small i cant see the caler name specialy when i am outside on daylight .
the biger issue is : the tuch is unresponsive when i receive calls ... i cant slide to answer and that happen 4 times today so i hard and soft reset but still unresponsive .
that might be an issue with your touch screen. Kindly visit apple center and get it checked. As far as small fonts are concerned I am aware of that issue and is finding the appropriate solution