@moonbutt was trying already but he struck out. However, there is a new tool called FlashFire from the dev of SuperSU that works for the AT&T S5 locked bootloader that *may* be worth checking out. I am NOT a dev, so I can't elaborate on it. If someone with that talent wants to check it out, maybe we can have something for our Tab4.
I did some research (just Googled flashfire works on locked bootloader) and chain fire said this "The app itself can work with a locked bootloader. But if you're going to flash things like custom kernels then your phone will (soft)brick. It's a warning/disclaimer just in case."
Here's his post http://forum.xda-developers.com/showpost.php?p=60059287&postcount=199
So... yeah someone might wanna try something idk.
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