Before we start, we should make sure you fully understand the concept of a custom ROM. The custom ROM is a third party version of the Android operating system. These versions are put together and offered to users by developers from the Android community. Custom ROMs are a bundle of advantages and upgrades, as the developers not only pack their ROMs with the latest version of the original, stock Android, but also put their own features on top. All kinds of options and settings are made available for the user, by the developers. “Customization” is the key word, as custom ROMs offer a lot of that. To get a custom operating system, rooting your phone is a must. After you’ve managed to root the device and install a custom recovery. you can use that recovery to flash custom ROMs on your handset.
The perks of having a custom ROM on your device are many, such as being able to get new, practically unreleased versions of Android before others, access to different themes and UI, such as TouchWiz by Samsung or Sense from HTC, and boost the phone’s performance and battery life.
Before you can start this tutorials, make sure that your device has been rooted, and also features a custom recovery.
Now that everything is clear and ready, let’s begin by getting the ROM itself. You can find a ton of ROMs for your device, either by searching on Google, or by looking through more specific sources, such as the websites of developers who put these ROMs together.
Now that you’ve got the desire custom ROM, it’s time to actually flash it on your device. Here is the step-by-step guide on how to do it:
- By using a USB cable, connect the smartphone to your computer, then copy the file containing the ROM. This usually comes in the form of a .zip file. Regardless of that detail, once you’ve gotten a hold of your custom ROM zip, copy it on the phone’s sd Card.
- Tun off your phone, then reboot it in TWRP recovery mode. You can achieve this by holding the Power, Home and Volume Up keys at the same time. Hold this button combination down until you see the TWRP Recovery logo on the screen.
- From the Recovery menu, select the Backup option, then check Boot, System and Data. Then, select Swipe to back up.
- Press the Home button to get to the main menu. then tap on the install button,.
- Browse through your files until you find the custom ROM zip that you put on your device in the first place. Once you’ve found it, go ahead and select it.
- Select the Swipe to Confirm option, to confirm the flash.
- You’re almost done. Now, simply tap on the Wipe Cache/Dalvik Button and start the process by swiping left.
- Select the system reboot option.
And there you have it, a freshly flashed ROM on your Galaxy S4. You can always try out new ROMs, by simply repeating these instructions, and even revert changes and go to the original stock Android.