1. AC Question's Avatar
    (I'm pretty new to troubleshooting androids. I have rooted two devices before, but I never ran into any problems with either. I just watched the videos and that's all) Hi, I got a Samsung Galaxy S5 (SM-G900A) running Lollipop 5.0 and I've been having trouble rooting it. When I try to use TWRP I get the same message every time. It says "FAIL! (Auth)". I looked it up and all the threads said the same thing, to disable reactivation lock which I did. Sorry it's kinda long xD, I try to get as much as I can in.
    06-17-2015 09:31 PM
  2. Golfdriver97's Avatar
    Welcome to the forums. Can you say to where you got your rooting instructions from?
    06-17-2015 11:08 PM
  3. BertMcfallen's Avatar
    I tried using towelroot although it said device is not supported. I can't do anything with Odin or I get the "FAIL! (Auth)" message. I noticed on the Download Mode I see "SECURE DOWNLOAD: ENABLE". Do you thing that could be it?
    06-18-2015 05:12 PM
  4. Golfdriver97's Avatar
    If the OS was updated so that the kernel was built after June 2nd, then yes.

    From my G4
    Android Central Ambassador Team Leader
    06-18-2015 08:24 PM
  5. Evan Mohr's Avatar
    Hello I have the exact same carrier and device model and unfortunately there is no root available, and when it's available if towel root doesn't work try changing mods strings.

    Posted via the Android Central App
    06-18-2015 08:45 PM
  6. troshs's Avatar
    As far as I know, AT&T has completely locked out the ability to root the S5. I tried with Odin several times and it failed within 2 seconds. Gave up after hours of Internet searching.

    Posted via the Android Central App
    06-19-2015 09:24 AM

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