How to set up your Samsung Galaxy S5 as a Wi-Fi mobile hotspot (Android KitKat with TouchWiz tutorial)
Your Galaxy S5 can actually serve as a mobile hotspot, sharing the nearly ubiquitous signal from a cellular network via Wi-Fi. You should just follow the few simple steps below and even novices will be able to get it up and running in no time. The only requirement for this is that you actually have a data plan on your phone. Keep in mind that the Wi-Fi mobile hotspot that you set up also uses your phone data plan and if your carrier charges you overage fees, you can easily gobble up through your data allowance in no time. This is a recipe for cell phone bill disaster, so make sure to use the mobile hotspot with proper caution: use the hotspot when you have an unlimited data plan or just make sure to keep your usage in check and do not start any heavy downloads (downloading a full-featured movie can easily eat up your data).
With all this in mind, follow steps 1 to 5 below to create a mobile Wi-Fi hotspot on the Samsung Galaxy S5, S5 mini, and 2014 Galaxy Tab S series tablets, while for earlier devices like the Galaxy S4, Galaxy S III, Note 3, Note II, as well as others running on the earlier version of the TouchWiz Nature UX, take a look at the last slide.