Here’s “CWM Method” of rooting your Samsung Galaxy S4.
Currently, this root method is only for the GT-i9500, GT-i9505, AT&T SGH-i337, Sprint SPH-L720, and Korean (E300S, E300K, E300L) until we have a stable, working CWM recovery for other models.
This root method works on Android 4.4.2 KitKat, 4.3 Jelly Bean and Android 4.4.2 KitKat for all models except AT&T SGH-i337. For SGH-i337, this root method works on 4.3 Jelly Bean and Android 4.4.2 KitKat.
For GT-i9505, AT&T SGH-i337, T-Mobile, Sprint SPH-L720, and Verizon, you can also use the other root method here.
For rooting Sprint S4 on MF9 firmware, see here.
Step 1. Power off you Galaxy S4 and hold down VolumeDown, Center Home, and Power buttons together for about 5 seconds.
Step 2. When you see the warning screen, let go of all buttons then hit the Volume Up button to enter ODIN Download mode.
Step 3. Connect a micro-USB cable from your Galaxy S4 to your computer.
Step 4. Next, download CWM recovery for your Galaxy S4. (Currently only GT-i9500, AT&T, and Sprint is available but I will be updating the page as soon as stable ones are available for other models.)
What is a Custom ROM?
A custom ROM is a custom, modified operating system that you can install on your Android device. Basically it's like installing Windows OS on a Macbook. By installing a custom ROM, you can bypass stock factory settings like locked hotspot tether, install new Android versions early, or even convert your phone into another OS.
With a custom ROM, you can really maximize the capabilities of your smartphone by adding custom features that have been developed by open source developers.
How to Install Custom ROMs
First, you will need to root your device, if it is not rooted yet, follow our root tutorial and root your phone.
Once rooted, you should have TWRP installed on your phone. Installation of a custom ROM is easy if you learn the basic of it. If you don't know how to install custom ROMs using TWRP recovery, see our tutorial on How to Install Custom ROM using TWRP!