First, what does rooting Galaxy S4 mean?
Rooting Galaxy S4 means that you gain admin access to your phone, sorta like having admin access/username for your Windows/Mac/Linux computer. In layman’s terms, you are basically getting 100% control over the Galaxy S4 you already paid for.
What does rooting Galaxy S4 do for you?
You will be able to run rooted app such as the DSLR Controller app, which requires root (or full admin access) and you will be able to use your Galaxy S4 as a Liveview monitor for your Canon DSLR camera. This is just one example where root can unlock potential of your Galaxy S4.
Titanium Backup app allows you to backup all of your apps and restore them easily. This is very useful for installing custom ROMs on the Galaxy S4 as sometimes you may have to reset your Galaxy S4 and restore all of your apps.
Another great way is to use Titanium Backup app is when you are upgrading your Android smartphone. Let’s say you upgraded from a Galaxy S3 to a Galaxy S4, then you can use Titanium Backup app to backup all of your apps on your Galaxy S3 then restore them on your brand, new Galaxy S4.
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!