Need help with root for Galaxy SM-J320VPP / android 6.0.1 - Android Q&A, Help & Troubleshooting

i know this is a newer phone but i'm still pretty surprised i haven't been able to find anyone that's rooted it yet. i've been all over the internet it seems. this is the :
Samsung Galaxy J3(6)
SM-J320VPP
Android 6.0.1 Marshamllow
Verizon pre-paid plan/network
i see lots of videos and guides for other j320f or j320p (close but no cigar) and nothing works. what i've tried so far:
- Dev mode enabled, USB debugging and OEM unlocked.
- any/all 1 click root apps. none worked, and i'd like to avoid these anyway unless you know it works 100% for my version. at this point i'll try anything.
- recovery / flash superSU. only i haven't even gotten past flashing a recovery. i've tried several different versions of Odin with several different versions of recovery .tar's and for each combination i've tried Odin simply fails. big red FAIL button in upper left corner. sadness. this seems like what i need help with. i have SuperSU downloaded so if i can just get a custom recovery working for my phone i'm hoping it's a simple process from there of booting into the custom recovery and then installing the SuperSU. presto.
is there no hope? is there no tested, confirmed working recovery that i can flash to my phone using Odin? i've tried Odins 3.07, 3.09, and 3.11.1. various custom recovery .tars but the only one i know for sure is the J2 version official from TWRP's website (yes i know it says J2 but someone on another thread said it's similar enough to someone ELSE's model "j320f" or something so i gave it a shot) the other recovery .tars i tried are suspect since they had generic names "recovery.tar" and were downloaded from links provided in many different "guides" that i've googled.
internet, you have failed me. thus do i issue this challenge to all those mighty phone hackers of the land. come forth and slay the evil giant that is my phone's ludicrous security (seriosuly how is this even a thing still in 2016. my phone can do so much more, so much better but for these shenanigans).
thanks so much in advance!
EDIT: not sure about the bootloader. i may be a complete idiot. yes. ok. i'm onto something. gonna post this anyway for any other poor soul that has this version phone, but i think Odin's probably failing because the bootloader is still locked. and Samsung doesn't make this easy like motorola or HTC. T_T. once more into the fray! i'll see if i can't track down a method for unlocking the bootloader on my phone. should i return victorious i'll go ahead and share my steps with the rest of the class.
EDIT2: there is no waking from this nightmare. i dig and dig and dig and can find no root. *sigh*
-- i've got android studio installed. and the java SDK platform-tools which contains the adb.exe, fastboot.exe, etc.
-- something i should explain here: in all these guides whenever there's a step that requires the phone to be connected to the PC, it simply says to, you know...connect your phone. but MY phone by default only uses the cable for battery charging. i have to (on my phone) swipe down from the top, select the "connected for charging" message bringing up "Use USB For" options, then select "Transferring media files" option. THEN my phone shows up both in my windows explorer and displays as a device when i run "adb devices".
--when i run "adb reboot bootloader" this does the same thing as holding down pwr/home/vol down - phone boots up into a blue (teal?) background with a large down arrow in center, below that it says "downloading...do not turn off target". in the upper left are several lines of system font style text:
ODIN MODE
PRODUCT NAME: SM-J320VPP
CURRENT BINARY: Samsung Official
SYSTEM STATUS: Official
FRP LOCK: OFF*
QUALCOMM SECUREBOOT: ENABLE (CSB)
RP SWREV: S1, T1, H1, R1, A1, P1*
SECURE DOWNLOAD: ENABLE
*the R's above may be A's or vice versa...hard to read font. sorry
--but as soon as i've rebooted into this mode, my phone disappears from adb devices' list of devices attached. regardless when i run the "fastboot oem unlock" command from the adb shell on my PC at this point i get the infamous "waiting for any device" message and then, of course, nothing....forever. i've also installed PDAnet but i think it's hitting the same road block where my phone is only using the cable for battery charging and i can't toggle that option from ODIN MODE. there's also a "USB Configuration" choice under development options on the phone that has the same options as "Use USB for" but this doesn't stick when booting into ODIN MODE. sadness. i need to retire my brain thoughts at this point. will post TL;DR. you're a saint of geeks if you've made it through my WoT to here.
EDIT3: just an observation - the only thing (so far) that will detect my phone in ODIN MODE is ODIN itself. is there a way to use ODIN to unlock the bootloader?
TL;DR: i think odin is failing when attempting to flash because of locked bootloader. need help with unlocking bootloader first? phone defaults to use USB cable for charging only so i CAN change that to MTP while phone is on normal and then run "adb reboot bootloader" but then phone vanishes from adb devices list once it reboots (and cable is then only charging). thus, cannot run "adb fastboot oem unlock" cuz it hangs displaying "waiting for any device" -- can i unlock the bootloader on this phone? or did i buy a phone that's IMPOSSIBLE TO ROOT!?!?

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I have the same problem! I need to root it to install the Patch to change from CDMA to GSM! Because I tried without root and it tells me "E: Signature verification failed"
Thanks

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Still nothing?
This is starting to look hopeless

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we need the stock recovery.img to be able to mod it and flash it through odin. the recovery for the verizon version does not match so odin wont allow it. i asked on sammobile and they said verizon only releases ota on the device. so idk what to do. perhaps someone with knowledge on this will help.
so far what ive figured out our situation is:
we need root to get root.
more specifically we need root to pull the recovery and then mod that recovery with twrp and use twrp to gain root. The root methods that worked for the other variant SM-J320P dont appear to work for ours, probably due to having android 6.0.1
till we get root we are stuck. the rest is easyish

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News?
There is nowbody that had been rooted his J3 Verizon yet?? We need help with this trouble!
In this forum (http://forum.xda-developers.com/android/help/galaxy-j3-sm-j320vpp-configuring-cdma-t3414049) Sergio said:
" try root with this root is only for Snapdragon 410 MSM8916
http://forum.gsmhosting.com/vbb/f723...t1994-1946985/ "
The J320VPP has a "1.2 GHz, Quad-Core". There is no place that sais it's a "Qualcomm Snapdragon 410 Msm:8916" processor. You think this suggestion could work?

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NerdmastaX said:
we need the stock recovery.img to be able to mod it and flash it through odin. the recovery for the verizon version does not match so odin wont allow it. i asked on sammobile and they said verizon only releases ota on the device. so idk what to do. perhaps someone with knowledge on this will help.
so far what ive figured out our situation is:
we need root to get root.
more specifically we need root to pull the recovery and then mod that recovery with twrp and use twrp to gain root. The root methods that worked for the other variant SM-J320P dont appear to work for ours, probably due to having android 6.0.1
till we get root we are stuck. the rest is easyish
Click to expand...
Click to collapse
I think I've managed to get the recovery.img with KIES... However flashing the image I've extracted doesn't work but if anyone is ready to help me port a recovery I might try !

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Whusky said:
I think I've managed to get the recovery.img with KIES... However flashing the image I've extracted doesn't work but if anyone is ready to help me port a recovery I might try !
Click to expand...
Click to collapse
im gonna try and do a reflash with kies and grab that file myself, ill work a bit on it because i love this phone but no basic root is driving me insane. if you can beat me to posting tell me how you got the file, otherwise ill post here once i find out. I'm not a top of the line developer but i can work my way around and try my best since nobody else is offering to help.
wish me luck.

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sorry for the double post but got the files via the verizon software assistant no problem. it ended up in C:\Users\YOURNAME\AppData\Roaming\Verizon_AR\SM-J320VPP_J320VPPVRU1APC3_FACTORY for me, and even decrypted and unzipped itself for me, now we just need to mod a custom thingy into those files and we can work towards rooting. so as i sit here and watch my phone finish flashing back to factory i will look into how we can mod the recovery. if someone is capable of doing it faster i can upload the files very quickly as its only 1.4 gb

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well turns out verizon locks the flashing with signature verfication. so unless verizon changes or root is found for marshmellow there will be zero possible root for this phone.

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NerdmastaX said:
sorry for the double post but got the files via the verizon software assistant no problem. it ended up in C:\Users\YOURNAME\AppData\Roaming\Verizon_AR\SM-J320VPP_J320VPPVRU1APC3_FACTORY for me, and even decrypted and unzipped itself for me, now we just need to mod a custom thingy into those files and we can work towards rooting. so as i sit here and watch my phone finish flashing back to factory i will look into how we can mod the recovery. if someone is capable of doing it faster i can upload the files very quickly as its only 1.4 gb
Click to expand...
Click to collapse
Hi I'm currently rooted with TWRP 3.0.2 recovery and mabey this might help http://forum.xda-developers.com/general/help/samsung-galaxy-j3-sm-j320fn-how-to-root-t3369511

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Sparko612 said:
Hi I'm currently rooted with TWRP 3.0.2 recovery and mabey this might help http://forum.xda-developers.com/general/help/samsung-galaxy-j3-sm-j320fn-how-to-root-t3369511
Click to expand...
Click to collapse
verizon blocks flashing of modified recoveries. so unless someone finds a root exploit for marshmallow we will have no luck.

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Has the kingroot method worked for root on your device ??

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NerdmastaX said:
we need the stock recovery.img to be able to mod it and flash it through odin. the recovery for the verizon version does not match so odin wont allow it. i asked on sammobile and they said verizon only releases ota on the device. so idk what to do. perhaps someone with knowledge on this will help.
so far what ive figured out our situation is:
we need root to get root.
more specifically we need root to pull the recovery and then mod that recovery with twrp and use twrp to gain root. The root methods that worked for the other variant SM-J320P dont appear to work for ours, probably due to having android 6.0.1
till we get root we are stuck. the rest is easyish
Click to expand...
Click to collapse
Hi to all, im new here and i am having the exact same problem! You say that there has to be a root specifically for the 6.0.. So i found that in the Chainfire page they have this https://download.chainfire.eu/986/CF-Root/CF-Auto-Root/CF-Auto-Root-j3lteusc-j3lteusc-smj320r4.zip already (i dont know if i can post links, so if i cant, sorry), it is marshmallow but the model is J320R4, so i was wondering if this could be the solution. i'll be waiting here for a response, i seriously love this phone :c

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MetAJFA said:
Hi to all, im new here and i am having the exact same problem! You say that there has to be a root specifically for the 6.0.. So i found that in the Chainfire page they have this https://download.chainfire.eu/986/CF-Root/CF-Auto-Root/CF-Auto-Root-j3lteusc-j3lteusc-smj320r4.zip already (i dont know if i can post links, so if i cant, sorry), it is marshmallow but the model is J320R4, so i was wondering if this could be the solution. i'll be waiting here for a response, i seriously love this phone :c
Click to expand...
Click to collapse
No, this is not the solution. When using a utlity like CF Auto Root, it must be specific to your model / carrier. Trying to install that will do 1 of 2 things.
1) Just fail in Odin
or
2) Soft brick your device
Since VZW doesn't bother to put out the full firmware files to reflash the device, it's not worth attempting without having the backup plan of the original firmware to flash via Odin.

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an twrp is already available for j320p u can try to root your device using it

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es0tericcha0s said:
No, this is not the solution. When using a utlity like CF Auto Root, it must be specific to your model / carrier. Trying to install that will do 1 of 2 things.
1) Just fail in Odin
or
2) Soft brick your device
Since VZW doesn't bother to put out the full firmware files to reflash the device, it's not worth attempting without having the backup plan of the original firmware to flash via Odin.
Click to expand...
Click to collapse
Understood, thank very much you for clearing that out. Since all this is pretty much a kick in the butt, do you think there will be some kind of solution to this or should we just lose hope? :/

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can Someone here help me with this.
someone wrote:
I have the same problem, I already got 4G LTE data with the correct APN and also I change to lte/gsm with the help of a network app and with commands in adb shell :
pm clear com.android.providers.telephony
settings put global preferred_network_mode 9
settings put global preferred_network_mode1 9
settings put global preferred_network_mode2 9
Click to expand...
Click to collapse
but i dont know how to initiate this adb mode in the phone. anyone?

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anyone fix ?
i have few units J320VPP same problem .. searching for service .

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That's a Verizon device with a locked bootloader, you cannot try twrp or modified files meant for 320f or other models on this one.
Sent from my SM-N920G using Tapatalk

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So has anyone found any luck with this device? It's driving me crazy not having root