[Samsung Galaxy Tab A series ROMs, Kernels, Recover] Delgoth:
Well the Chipset of the SM-T357T is the Snapdragon 410(e). Meaning it is the APQ8016 brand chip. Not the Spreadtrum.

The entire T35x line of products looks to use the MSM8916 mainboard. The SM-T560NU also uses this chipset. So really, you SHOULD BE able to in theory flash any ROM compatible with the MSM8916 chipset. But if you are using a tablet that actually has a Modem installed and active, flashing a ROM specifically for the T350 for instance, will not get you any mobile data. As the T350 doesn't include a Cell Processor in its firmware, and I don't think the system would be setup to use a radio/modem. If anything I would try a ROM for the SM-T355. That is at least a 4G/LTE device using the same exact chipset. Or the SM-T285 is the next closest one.

However there are different versions of the Snapdragon 410/MSM8916 System-on-a-Chip. The APQ8016 version of the SoC has a cpu speed of 1.2GHz paired with 1.5GB of RAM. Which is what is installed in the T350/T355/P350/P355/T357/T377 & T560NU (US Edition of the T560).

But I've found two versions of the Spreadtrum version of the SD410, one from 2015 and one from 2016. Meaning I've found 3 different versions of the MSM8916.

The SM-T280/285 uses the "Spreadtrum SC9830" chip. The SM-T560 International Versions use the "Spreadtrum SC7730SE" chip. Both are still considered Snapdragon 410 SoC's. Yet I don't know how the different chip inside the SD410 affects the build process.

It looks like, in 2016 Qualcomm changed up the Spreadtrum Chip it used in the Snapdragon 410. I say this because in 2015 when the SM-T280/285 was originally announced it only shipped with a 1.3GHz cpu which is indicative of the "Spreadtrum SC7730SE chip being used. Because the other Galaxy Tablets running @ 1.3GHz use the "Spreadtrum SC7730SE" Snapdragon 410. Only the APQ8016 editions run @ 1.2GHz.

But in 2016 when they released a new version of the T285, the device now runs at 1.5GHZ, and it now uses the "Spreadtrum SC9830" edition of the Snapdragon 410. The new 2017 version of the Tab A 8.0 T350 (Now called the Tab A2 S/SM-T380), now uses the MSM8917 Chipset otherwise known as the Snapdragon 425. The CPU runs @ 1.6GHz and is paired with 2GB of RAM. It also now has 32GB of internal storage versus the standard 16GB.

What I'm saying, be careful what yearly model you have of your device. It seems Samsung has been updating the hardware without always changing model numbers every year. But from what I've seen of LineageOS or CyanogenMod development, the build process is centered around which mainboard your device uses. At most I think the biggest obstacle to porting a ROM between devices on the same chipset, is getting the specific kernel from each device and building to that kernel. I think I'm talking about the Device Tree here.

Hope I helped! I've been doing a lot of research on the Galaxy Tab as of late. I got myself the 2015 Versions of T350 & T560NU. I want to make a single ROM for both of the devices. I just need to figure how the Spreadtrum and APQ chip affect the build process.

[MENTION=4899305]ashyx[/MENTION] , Do you have any insights concerning my post here? You seem to know a lot about building for the Galaxy Tab line of devices. I feel the best place to start building for the SD410 would be your github repos.

EDIT: I feel like the APQ8016 devices are also the Armv7 32-Bit Devices, with the Spreadtrum chips being the Armv8 64-Bit devices. Because notebookcheck.net actually lists the Snapdragon 410 MSM8916 & Snapdragon 410 APQ8016 separately. The MSM8916 does come in both 32-Bit and 64-Bit flavors. I know the T350 & T560NU are both 32-Bit Devices. And both have APQ8016 chips.

The APQ8016 Chips don't include a radio on the SoC, where the standard MSM8916 does. I believe the APQ chips run ~100-200MHz slower because they don't have a Cell Processor to handle. But my APQ8016 devices show up as having the MSM8916 mainboard in all the apps I use to check my hardware.