Update AT&T Galaxy S4 I337 To Official Android 4.4.2 Kitkat OTA

AT&T Samsung Galaxy S4 I337 has received an official android 4.4.2 kitkat OTA update. The update can be directly downloaded to the phone itself. Most people still didn't get the OTA update but in this tutorial I will teach you to manually update your AT&T galaxy S4 to android 4.4.2 kitkat OS.

android kitkat update at&t galaxy s4


  • Backup all important data stored on your phone.
  • Download the AT&T galaxy s4 android 4.4.2 kitkat I337UCUFNB1 OTA.
  • Download Samsung USB drivers from this link.
  • Your phone's battery should be charged to more than 50 percent level.
  • Rooted AT&T Galaxy S4 users your phone may become unrooted after this OTA update.

  • This tutorial is meant to be applied only on the AT&T Samsung Galaxy S4 I337 model. Do not apply it on any other versions, otherwise your phone might not be usable.
  • Follow the steps carefully as skipping any one step may result in a bricked phone.
  • If OTA update for AT&T Galaxy S4 is available in your country then skip this procedure completely.
  • If anything bad happens with your Galaxy S4, then you will be liable for the doings.

How To Flash I337UCUFNB1 Android 4.4.2 KK OTA Update On AT&T Galaxy S4

  • You have downloaded the I337UCUFNB1 update file above. Now change its name from '2400258.zip' to 'update.zip' for convenience. You can use a PC to download this OTA file if your phone's browser is unsupported. For best results use UC browser HD if you are downloading the file on the phone's storage.
  • Now put this update file directly into the home directory of internal storage or external sdcard of your galaxy S4.
  • Now turn off your galaxy s4 and reboot into recovery mode by pressing Volume up, Home and Power buttons at the same time. Do not release the buttons unless you see recovery mode on your galaxy S4.
  • Select 'apply update from sdcard' and choose the 'update.zip' OTA file that you put either into the internal storage or external sdcard of your phone.
  • Let the update process to complete.
  • Reboot the phone after update.
Now you have successfully updated your AT&T galaxy S4 to Android 4.4.2 kitkat OS.

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