It would be better to get your "buddy" to do a little reading instead of asking questions on his behalf. Is there a reason you are asking these questions and your buddy isn't responding himself? Well, you can tell your buddy it would be good to read the "pinned" threads in the General and Q & A sections. There is a lot of information and links in those threads that will help your buddy to learn about the phone and what he is doing to it before it becomes a brick. Good luck to your buddy.
SGH-I337 (AT&T) 32GB
P-ROM (1st Gen.), De-Odexed, AMDL
Auto-LOKI OUDHS CWM
Make sure you read and understand the "PINNED" threads in the "General" and "Q & A" sections of the AT&T S4 forum BEFORE you ask for help. Use the forum's "search" function to find posts with additional information. You should not expect others to help you if you haven't tried to help yourself first. Also, read, understand, and follow the "XDA" rules.