This is the official Straight Talk Galaxy S5 user manual in English provided from the manufacture.
The official model number for Straight Talk Samsung Galaxy S5 is Samsung SM-S902L. The Straight Talk Samsung Galaxy S5 user manual is now available for download from Straight Talk official support website.
You can download the user manual from below link:
Also you can read the Samsung SM-S902L online Tutorials via this link.
Enjoy your Samsung Galaxy S5.