Why should I update my phone?
Running the latest software and operating systems are an important part of staying secure for all devices, such as desktop computers, laptops, and phones. A lot of the time when your phone notifies that there is an update ready to be installed, it includes a security patch that is needed to fix a vulnerability that was detected in the system. Not only should you update your phone's operating system, but also the applications that are already installed.
How to I update my phone?
Sometimes your phone will not notify you if there is update. In this case, check the settings for anything concerning "software updates", typically found in a "general" section within the settings. If available, consider setting up your phone to update to the latest version automatically. This will save you from having to remember to check if a software update is available and ready to install.