Originally Posted by swinzo1010
This same thing happened to me. I have a rooted GS4 as well on ATT. It also made it to 26% and then said update failed. I have tried to update 3 times now. Did you ever get this figured out?
unroot your phone and then update and it will work. just be warned that you wont be able to re-root afterwards because they patched the root exploit.