Samsung Galaxy S4 models have started receiving CyanogenMod 10.1 officially. Here is the tutorial to install the popular bloatware free custom firmware on your Verizon Galaxy S4 SGH-i337.

Note: this guide is specifically focused on installing CyanogenMod on AT&T Galaxy S4 SGH-i337, for installing CM10.1 Nightly on Verizon Galaxy S4, read this tutorial, or CM10.1 for VerizonCyanogenMod for T-Mobile, and CM 10.1 for Sprint SGS4 to flash CyanogenMod on other Galaxy S4 models .

Prerequisites to install CM10.1 Nightly on AT&T Galaxy S4 SGH-i337:

  • Create a backup of all important data in your Galaxy device.
  • Download and install USB drivers for Galaxy S4 in your computer.
  • Enable USB debugging option by pressing Menu > Settings > Applications. Navigate and tap on Developer Options to ensure that USB Debugging is enabled.
  • Make sure that ClockworkMod recovery or TWRP is installed.
  • Ensure that your SGS4  carries more than 70% of charge.

 Guide to install CM10.1 Nightly on AT&T Galaxy S4 SGH-i337:

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Required files: download CM10.1 file for Galaxy S4 i337 from here. Also download the Google Apps Package from this link for Galaxy S4.

  • After downloading the above files on your computer, connect your Galaxy smartphone with the computer using the USB data cable and copy both these files on your Galaxy S4.
  • Disconnect Galaxy S4 from the PC and switch it off to boot it into the recovery mode: press the volume uphome and power buttons simultaneously – release when the Samsung logo shows up.
  • From the recovery mode menu now, perform the data wiping tasks: select wipe data/factory reset option and confirm the operation – Select the wipe cache partition to clear the cache and wipe dalvik cache to clear dalvik.
  • Next, flash the ROM file: select install zip from sdcard and follow by taping on the choose zip from the sdcard option. Locate the CM10.1 ofr AT&T ROM file and confirm installation.
  • Once installation is completed, repeat the above step but this time choose and install the Google Apps package file instead of the firmware file.
  • Once done go back to main recovery menu and select reboot system now to boot your AT&T Samsung Galaxy S4 SGH-i337 to the newly flashed CM 10.1 Nightly mode.

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