For those of you looking to experience Android 6.0 Marshmallow with full root, I have good news for you. There’s a ROM by the JDC Team (Jflte DevConnection Team) that can be installed on all AT&T, T-Mobile, Sprint, Verizon, Canadian, GT-i9505,GT-i9507, and GT-i9508 variants. (For AT&T and Verizon, you MUST have older bootloader with CWM or TWRP recovery installed!!!)
Based on Android 6.0 sources, this Android 6.0 ROM by JDC Team brings you the pure Android to your Galaxy S4. This isn’t a CyanogenMod either so you will get all of the standard Android 6.0 features just like on a Nexus phone.
Performance is excellent and I have tested the battery life to be excellent especially with DOZE mode also working (that allows your phone to save ton more battery life on standby with Android 6.0). Everything works out of the box including voice, data, bluetooth, etc..etc… The camera works fine also except it sometimes force closes when switching back and forth between still and video recording but a simple restart of the camera app fixes the issue.
The only thing missing? This ROM doesn’t support exFat format for microSD cards so make sure you format them as fat32 before using them. Overall, this is actually one of the stable Android 6.0 ROMs I’ve tried on a non-Nexus device so definitely give it a test drive this week(end) and do let me know what you think! But I think you will love it and finally experience Marshmallow!
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!