This is the online version of Galaxy S4 manual (User Manual for I9500/9505, SGH-i337). You can read it online whenever you want. If you want to download the PDF version of the user manual, you can go to this page to download the user manual of your language.
Enjoy this Galaxy S4 online manual. If you want to know some features in detail, you may check this page: Galaxy S4 features explained.
If you cannot decide a case or cover for your S4, you may check this Galaxy S4 case and cover guide.