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For those of you who have been waiting for App2SD functionality on your Galaxy S4 due to lack of app storage, we’ve got some great news for you. Samsung is rolling out new official firmware updates as we speak that supports App2Sd.
This means you won’t even need root to move all of your favorite apps to your microSD card.
As of this writing, Samsung has only rolled out the new App2SD feature for Galaxy S4 GT-i9505 models. If you have a GT-i9505, you can download the official stock firmware and install it using ODIN (See unroot instructions for that).
Download GT-i9505 Official Stock Firmware with App2SD (Build XXUBMEA)
Also, for AT&T and T-Mobile users, you should be able to install this new firmware as a custom ROM (in the next couple days) easily and enjoy the new App2SD feature also. As for Verizon, Sprint, and GT-i9500, there may be custom ROMs with the support soon.
At the worst, Samsung will roll out this new App2SD feature for all Galaxy S4 smartphones so be patient while they do.
As for those of you with GT-i9505, here’s how to move apps to SD:
Step 1. Go to Settings->More and select “Application Manager”.
Step 2. Select an app you want to move to your SD card such as Angry Birds.
Step 3. Choose “Move to SD card”, that’s it!
Step 4. Once your app has been completely moved to your SD card, you will see how much space it’s been moved to SD card under “SD card data”.
If for any reason you want to move your app back to your internal storage, simply select “Move to device storage”.
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!