For those of you who love Avengers and the Hulk, you will definitely want to get the Hulk Theme APK for your Samsung phone.
Installation is easy, see tutorial on how to install themes here.
What is an APK File?
APK File is a file/app that can be installed on any Android smartphone or tablet. Using an APK file, you can install Android apps manually on your Android device.
You do not need a rooted Android device to install APK files. For installation instructions, please see below.
How to Install APK Files
You will need to make sure Unknown Sources is checked ON in Settings to install APK files. We do recommend you to use a file explorer app such as ES File Explorer, available on the Play Store for free, to install these apps.