Android 4.4.3 KitKat for Google Nexus 5 adds
a revamped dialer app which now displays cards for each contact in the favorite list, the dialer with new colors, new more colored icons instead of blank image contacts.
Android 7.0 Nougat update brings the following new features: improved Phone
app and stylized
dialing screen giving it a new look and feel, tweaked battery indicator, two power saving modes for you to choose from and get better control over your phone's battery life, a new power monitor that you can use to block various
apps from using any battery, transparent
app folders, Blue Light filter, a new Screen Resolution changer to get better battery life, new Device Maintenance that will improve optimization of various power and storage functions,
revamped toggles, Video Enhancer that offers better video and sound quality, new Calendar
app interface, third - party
app functions can now be set as toggles, and others more.