The Samsung Galaxy S Blaze 4G is quite similar to the Samsung Galaxy S2 excluding the chipset and a few other minor features. The device is available on T-Mobile and though it comes with Android 2.3 Gingerbread out of the box, you can upgrade your Galaxy S Blaze 4G to Android 4.3 Jelly Bean by installing the official CyanogenMod 10.2 ROM on your device.
The CyanogenMod team which is now Cyanogen Inc. has extended its support to the Galaxy S Blaze 4G by compiling their custom ROM for this device. Also, the versions available as of now are nightly versions which means that the ROM is updated quite frequently every night.
Since this process requires root access and CWM installed, it does void the warranty of your phone. However you can claim the warranty by rolling back to stock. You can do so by flashing the stock firmware on your phone using Odin.
To get started, you need to have root access. After this, to get CWM on your device, you can install ROM Manager app by Koushik Dutta and select the option to flash CWM. After this, download the ROM and correct Gapps zip file from the link at the end of this post. Place both zip files in your device’s storage and flash both the zip files via CWM. Before you flash these files, make sure you wipe data, cache and dalvik cache. After you reboot your system, you should be experiencing Android 4.3 on your Galaxy S Blaze 4G.
Get.cm [It is recommended that you avoid flashing the 20130925 nightly. It contains a fstab issue that will interfere with CMUpdater.]