Why is my Samsung Galaxy S4 SO SLOW?

[melissa]

There are a variety of reasons why your phone is so slow.
1) You have too many applications installed on your phone - as the storage space on your device fills up, the phone becomes slower and slower. Having as much free space available as possible will solve the issue if this is the problem.
2) There are too many applications/processes running in the background - You may have opened up too many apps or your phone may be running things in the background that you don't even know about. Try closing all open applications AND clearing your RAM (both of these options can be found under your task manager, although the 'Clear RAM' option is sometimes hidden a bit.
3) The software on your device may be outdated - Samsung and Android sometimes release software updates that help to speed things up. Check for updates for your phone by going to your settings and finding the 'software updates' option.

If none of these options work, contact Samsung and outline your problem to them. They may suggest alternative fixes or replace the phone if necessary.