How to block latest OTA update on AT&T Galaxy S4 (SGH-I337)

For many AT&T Galaxy S4 (SGH-I337) users, root access is important and they even think that it should be on every Android phone. However some of them don’t realize that an official OTA update has the potential to make their phones unrooted for a long time (due to the previous root method is unusable), if there’s no developer who can build new exploit for a latest firmware from OTA. It recently happened to a software update that was released in July (Build I337UCUAMF3), which successfully make some users frustration for losing root.


Lesson learned for rooted Galaxy S4 users, so when there is a new software update available make sure that we know whether the update contains security patches before installing it. If you’re not sure the contents of the OTA update, you can defer to install it, however the update notification that can’t be removed from the status bar could be disturbing.

block latest ota update galaxy s4 att

Image: Samsung/AT&T

Yet another solution to prevent accidentally install an update is to block the OTA from AT&T Galaxy S4 (SGH-I337) which explained below, so we won’t get a notification about the update anymore, and when someday you know that the new software update is safe, we can restore it and manually check for updates.

  1. Since we must rename the existing file on the system partition, then our phone should be rooted.
  2. Get a file manager app, but make sure the app has the ability to read and write system files. You can search it in the Play Store using root explorer keyword. Additionally, you can also make use of Titanium Backup or other similar tools, which have the ability to freeze system apps.
  3. Now go to “/system/app/” folder, and look for “wssyncmldm.apk” file.
  4. Tap the file and rename it to “wssyncmldm.apk.bak”.
  5. Once completed, now reboot the phone.



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2 Responses

  1. Joe
    October 16, 2014 at 10:01 AMReply

    On my S4 i337 I found the file wssyncmldm.apk to be located in system/priv-app/

  2. unk
    July 21, 2016 at 10:05 PMReply

    This screwed my phone up. thanks!

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