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Samsung galaxy s3 (SCH-S968C) root / custom rom

« on: December 30, 2014, 04:20:10 PM »
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  • Bigmodz54

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    What is the safest way to root the samsung galaxy s3 from straight talk. And after I root it what is the fastest most secure custom rom for it? And how much better/worse is it then stock os? Thanks for all your help (:
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #1 on: December 30, 2014, 04:25:21 PM »
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #2 on: December 30, 2014, 05:21:24 PM »
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    signature bugs unavailable when i run cydia impactor
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #3 on: August 12, 2015, 10:28:18 AM »
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    What is the safest way to root the samsung galaxy s3 from straight talk. And after I root it what is the fastest most secure custom rom for it? And how much better/worse is it then stock os? Thanks for all your help (:

    The best way is to downgrade to H1 baseband using ODIN.. then you can install SuperSU from playstore. 

    The ROM choice will be up to you..  Since you are rooted, you can delete a lot of the un-needed apps.  But in my opinion TouchWiz is a very slow and clumbsy OS. 
    If you go with a more recent rom (4.4 to 5.1) then you will need to get a Verizon SIM card to be able to get Data / MMS (stock will not work, i use hangouts).  Another major issue could be the Camera.. but CM12.1 seems to work fine.

    For me the speed of any custom rom will beat 4.1.2 Touchwiz..  that is why I don't plan to go back.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #4 on: September 01, 2015, 01:43:14 PM »
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    What is the safest way to root the samsung galaxy s3 from straight talk. And after I root it what is the fastest most secure custom rom for it? And how much better/worse is it then stock os? Thanks for all your help (:

    The best way is to downgrade to H1 baseband using ODIN.. then you can install SuperSU from playstore. 

    The ROM choice will be up to you..  Since you are rooted, you can delete a lot of the un-needed apps.  But in my opinion TouchWiz is a very slow and clumbsy OS. 
    If you go with a more recent rom (4.4 to 5.1) then you will need to get a Verizon SIM card to be able to get Data / MMS (stock will not work, i use hangouts).  Another major issue could be the Camera.. but CM12.1 seems to work fine.

    For me the speed of any custom rom will beat 4.1.2 Touchwiz..  that is why I don't plan to go back.
    He has been rooted and on lollipop since Feb, if you've read the other threads then you should have seen where I helped him.

    Also, downgrading is only for those with MH2 baseband, MH1 users are already on the downgraded firmware and you don't install superSU after downgrading, you use cydia impactor or towelroot to get rooted and THEN you install superSU and recovery and ROMs.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #5 on: September 16, 2015, 04:29:42 PM »
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    Your best bet might be to use towelroot.

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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #6 on: September 27, 2015, 03:58:31 PM »
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    Here you go. This should be helpful. :)

    You are not allowed to view links. Register or Login***-all-things-root-***-335/the-ultimate-'root-recovery-rom'-guide-for-the-sch-s968c/
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #7 on: September 27, 2015, 08:59:15 PM »
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    Regardless of the baseband version, cant you just flash cwm or twrp with odin then flash root zip to root?
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #8 on: September 27, 2015, 10:30:04 PM »
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    Regardless of the baseband version, cant you just flash cwm or twrp with odin then flash root zip to root?
    Not sure exactly. The recovery is on a very specific partition and I have no idea if there's a way of telling ODIN that. That's why I prefer dd. It's much easier when you can specify the exact location that you're managing.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #9 on: September 29, 2015, 03:33:23 PM »
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    Regardless of the baseband version, cant you just flash cwm or twrp with odin then flash root zip to root?
    Not sure exactly. The recovery is on a very specific partition and I have no idea if there's a way of telling ODIN that. That's why I prefer dd. It's much easier when you can specify the exact location that you're managing.
    Actually yes, this method does now work on the H2, let me explain, previously the recoveries would not root the sch s968c by flashing superSU zip because they were for d2vzw(Verizon s3) and did not work as they should on the d2tfnvzw(ST S3).

    Now, since the recoveries have improved since this method was first tried and abandoned because of it not working, it now works depending on how new the recovery is, older ones are not as reliable, and even all the new versions are probably hit or miss on which will work or not.

    There is actually a new TWRP that has been compiled from source specifically for d2tfnvzw instead of d2vzw that is guaranteed to work for this method but at the moment it only exists in zip format and will be converted to Odin flashable soon. This discovery is only 2 days old at the time of this post and none has had time to convert the file, when it is done I will post it in a new thread for rooting the SCH-S968C with H2 firmware WITHOUT needing to downgrade. Also there will be new ROMs made for d2tfnvzw instead of having to use the d2vzw ones. When this development starts I will be posting here in this forum for everyone to enjoy.
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    Regardless of the baseband version, cant you just flash cwm or twrp with odin then flash root zip to root?
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #10 on: September 29, 2015, 03:44:35 PM »
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    Interesting. I'm glad development is still being continued on a nearly 3 year old device. Which exploit is being leveraged to gain root since the master key bug isn't present in the H2 firmware?

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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #11 on: September 29, 2015, 06:23:28 PM »
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    Interesting. I'm glad development is still being continued on a nearly 3 year old device. Which exploit is being leveraged to gain root since the master key bug isn't present in the H2 firmware?

    Sent from my SCH-S968C
    I don't know the exploit, until 2 days ago the two only known exploits were supposedly patched in the H2 kernel, that is why the downgrade to H1 was being used because it does not have the patched exploits, that I know of there is only 1 documented rooted H2, the rest are downgraded.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #12 on: September 29, 2015, 07:24:04 PM »
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    Interesting. I'm glad development is still being continued on a nearly 3 year old device. Which exploit is being leveraged to gain root since the master key bug isn't present in the H2 firmware?

    Sent from my SCH-S968C
    I don't know the exploit, until 2 days ago the two only known exploits were supposedly patched in the H2 kernel, that is why the downgrade to H1 was being used because it does not have the patched exploits, that I know of there is only 1 documented rooted H2, the rest are downgraded.
    Welp, can't wait to check it all out regardless. Is there an H2 MD5 image floating around like there is for H1? I'm considering starting fresh just for this.

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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #13 on: September 29, 2015, 07:30:52 PM »
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    Interesting. I'm glad development is still being continued on a nearly 3 year old device. Which exploit is being leveraged to gain root since the master key bug isn't present in the H2 firmware?

    Sent from my SCH-S968C
    I don't know the exploit, until 2 days ago the two only known exploits were supposedly patched in the H2 kernel, that is why the downgrade to H1 was being used because it does not have the patched exploits, that I know of there is only 1 documented rooted H2, the rest are downgraded.
    Welp, can't wait to check it all out regardless. Is there an H2 MD5 image floating around like there is for H1? I'm considering starting fresh just for this.

    Sent from my SCH-S968C
    No, but myself or a member of Team OctOS will be working to pull and put together an H2 IMG, it won't be a complete H2 because there are certain parts we can't get with a dump or other methods but those pieces can be pulled from the H1 to fill the gaps to make a complete H2 for those that want to go back to H2 or even for those with original H1 that want H2 for whatever reason.

    Actually the plan is to create a stock H2 rooted Odin flashable tar with TWRP and superSU, with that anyone with either device can just flash that tar in Odin and everything is already done, rooted, TWRP, first boot and you're all ready to start flashing ROMs, one fell swoop.

    At the moment I'm still researching how likely it is, I don't know exactly all the security measures I'm dealing with, I've used 4.1.2 rooted tar files before and as far as I know the same thing can be done with our stock 4.1.2, I'm still finding the details to avoid potentially damaging whatever device it gets tried on first.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #14 on: September 29, 2015, 09:20:45 PM »
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    Interesting. I'm glad development is still being continued on a nearly 3 year old device. Which exploit is being leveraged to gain root since the master key bug isn't present in the H2 firmware?

    Sent from my SCH-S968C
    I don't know the exploit, until 2 days ago the two only known exploits were supposedly patched in the H2 kernel, that is why the downgrade to H1 was being used because it does not have the patched exploits, that I know of there is only 1 documented rooted H2, the rest are downgraded.
    Welp, can't wait to check it all out regardless. Is there an H2 MD5 image floating around like there is for H1? I'm considering starting fresh just for this.

    Sent from my SCH-S968C
    No, but myself or a member of Team OctOS will be working to pull and put together an H2 IMG, it won't be a complete H2 because there are certain parts we can't get with a dump or other methods but those pieces can be pulled from the H1 to fill the gaps to make a complete H2 for those that want to go back to H2 or even for those with original H1 that want H2 for whatever reason.

    Actually the plan is to create a stock H2 rooted Odin flashable tar with TWRP and superSU, with that anyone with either device can just flash that tar in Odin and everything is already done, rooted, TWRP, first boot and you're all ready to start flashing ROMs, one fell swoop.

    At the moment I'm still researching how likely it is, I don't know exactly all the security measures I'm dealing with, I've used 4.1.2 rooted tar files before and as far as I know the same thing can be done with our stock 4.1.2, I'm still finding the details to avoid potentially damaging whatever device it gets tried on first.
    Nice. Hopefully all goes well. It's been a while since I've been excited about phone development.

    Sent from my SCH-S968C

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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #15 on: October 03, 2015, 05:35:28 PM »
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    If the baseband is H1 and you flash cwm 6.0.4.5 through odin, then flash the new twrp zip from teamoctos, will that be a safe way to have the recovery be installed to the right partition and be able to use the root zip to root it?
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #16 on: October 03, 2015, 09:01:35 PM »
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    If the baseband is H1 and you flash cwm 6.0.4.5 through odin, then flash the new twrp zip from teamoctos, will that be a safe way to have the recovery be installed to the right partition and be able to use the root zip to root it?
    I don't think you would be able to flash the TWRP zip without having root, but with the new discovery Canodroid15 and myself(I'm Droidriven there and a few other places)are pursuing to improve on it , apparently flashing superSU in CWM works to root just fine then you could flash the TWRP zip, here's the thread where we've been talking about it if you haven't seen it already.

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    Look on the last two pages, Bumpum posted the version of CWM and superSU he used to root an H2 without downgrading, to be honest the superSU flash to root method hasn't been tried on an H1 that I know of so I'm not sure it works or not, in theory it should since it now works on the H2. When myself or Canodroid can find the time there will hopefully be a rooted Odin tar with the team OctOS TWRP and superSU in it so that everything can be done all in one step, we'll try for a rooted H1 tar and a rooted H2 tar if it works out, it depends on how much security was updated in our version of 4.1.2, the S2 has rooted 4.1.2 tars so chances are good it will work for the S3 4.1.2.

    Either way as it stands, both versions are easily rootable and custom flashed.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #17 on: October 03, 2015, 11:05:44 PM »
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    Actually, unless the bootloader prevents it, you can write partitions all day long without root. I ran my S6 in this way for quite a while.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #18 on: October 04, 2015, 01:24:11 AM »
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    Actually, unless the bootloader prevents it, you can write partitions all day long without root. I ran my S6 in this way for quite a while.
    Yeah, that makes sense. Since the master key CVEs were present in the H1 firmware, it was making me wonder what OctOS was doing to root H2. If they had found a new 0day, it would have been phenomenal. Though a case of "lol it just works now for some reason" seems a lot better just because of the irony.

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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #19 on: October 04, 2015, 02:48:47 PM »
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    Samsung has unlocked bootloaders so it shouldnt be an issue. i flashed cwm tar file through odin then flashed twrp zip from cwm then rooted with the root zip
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #20 on: October 04, 2015, 03:05:07 PM »
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    Actually, unless the bootloader prevents it, you can write partitions all day long without root. I ran my S6 in this way for quite a while.
    Yeah, that makes sense. Since the master key CVEs were present in the H1 firmware, it was making me wonder what OctOS was doing to root H2. If they had found a new 0day, it would have been phenomenal. Though a case of "lol it just works now for some reason" seems a lot better just because of the irony.

    Sent from my SCH-S968C
    It works now because the recoveries are better and actually work as they are supposed to on the ST S3, earlier versions were missing something, they worked fine on the Verizon S3 but not ours, what was missing I have no idea. I couldn't get a working TWRP until I hooked up with Grommish at OctOS to make the d2tfnvzw TWRP. Now d2tfnvzw source has been merged with all the d2vzw development for OctOS.
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    Re: Samsung galaxy s3 (SCH-S968C) root / custom rom

    « Reply #21 on: October 04, 2015, 09:39:33 PM »
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    Samsung has unlocked bootloaders so it shouldnt be an issue. i flashed cwm tar file through odin then flashed twrp zip from cwm then rooted with the root zip

    To prevent sharing misinformation, I'm going to add to your statement:
    Historically, Samsung has had unlocked bootloader, but in recent years subsidized devices have been getting locked down for "Enterprise" reasons. T-Mobile and the various MVNO carriers haven't really followed this trend thankfully.
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