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[GUIDE]How to flash CM/CM based 4.4.4 to 6.0+ ROMs on SCH-S968C and setup SIM/APN

Thread starter Droidriven
Start date Apr 3, 2016
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noidodroid

Senior Member

Sep 27, 2019

#61

Ibuprophen said:
I do too... Even the MS-DOS before Windows.

I used to be Microsoft Certified for a handful of their software. After all these years, i'm still registered as a Microsoft OEM System Builder. It was cool to get a hold of Microsoft Software before they were officially released. LMAO!

~~~~~~~~~~~~~~~
Unless asked to do so, PLEASE don't PM me regarding support. Sent using The ClaRetoX2 Forum App on my Sanyo Juno device.

You betcha. I was never officially certified but our company years ago had MSDN access so I got to play around with everything MS had out. Since then I have been an insider since the start when you had to register and get approved. That's about the last I have really got into MS more than usual. Now looking to create my own deployable version of Win 10 and 7 dual boot or Win 10 and Win 7 VM. Pretty much for business so I can setup a easily deployable distro for when major system crashes occur and or i get ahold of a real nasty virus like Floxif.f or Floxif.H which will demolish a windows machine quick (pretty common one that floats around in my line of work) Even being sandboxed doesnt help 100%. I am now reading about Windows To Go also so really want to as well get a good solid configured version with all my apps i use setup then get the WTG version that can be used on the go for when I want to boot from a clients pc and fix issues.

Darn it! Love all this old time days chat, We are keeping this thread alive for sure but taking it way OT. lol

Here in the coming weeks I am going to get the S3 back out and toy with it some more. I have like 3 or 4 S3 now 1 tracfone together but cracked screen, another verizon i started modding but with locked bootloader and a few for parts one bricked tracfone if anyone needs anything.

Last edited: Sep 27, 2019

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INTRO:

The mission of this thread is to make some potentially important information available to all users that have the SCH-S968C(All Tracfone carrier models) that has been gathered over the last year and a half for flashing CM/CM based ROMs on the SCH-S968C .

Though this information is available in many other places, I'm collecting it all into one place to try and make it as painless as possible for everyone with the SCH-S968C. This guide is a long one and has many steps but I've attempted to make it as straightforward as possible for those that are new to rooting and flashing.

BACKSTORY:

Starting from some time in 2014 there have been a lot of users with the SCH-S968C that have flashed a CM11/CM12/CM13 or CM11/CM12/CM13 based custom ROM and didn't have mobile data(3G) or even no cellular signal after flashing and were like:

"OH MY GOD! WHAT DID I DO!?"

Then they would start flashing other ROMs or flashing back to stock to straighten the issue out, only to find that didn't help and none of the typical or expected solutions would correct the issue. Many were flashing modems and swapping system files in an effort to get data working, all of which ended with either a non-working device or a bricked device, do not try the things they tried, that is not the fix for the situation.(if you are one of the ones that lost signal and can't get it back even on stock, I'll discuss the fix for that in TROUBLESHOOTING at the end of this guide).

THE REASON:

These users would have no signal after flashing because unfortunately, these ROMs are built for the Verizon S3 SCH-I535 but the SCH-S968C can flash them(it actually has the SCH-I535 Verizon motherboard with 4G disabled in the hardware, making it 3G only). The Verizon S3 is a 4G/LTE device, Verizon uses a CDMA 4G/LTE SIM in their 4G devices to regulate 4G data. This SIM requirement is built into the ROMs themselves. Even though the SCH-S968C is a 3G device, this makes these ROMs require a CDMA 3G/4G/LTE SIM when flashed on the SCH-S958C to receive at least data(some of the ROMs even require it for cellular service also, not just data).

The discussion of all of this about the SIM, what has been tried to bypass the SIM and the things discovered to leave the SIM and get everything working at its best can be found in THIS THREAD. Most of the issues and fixes for the KK and newer ROMs, all the troubleshooting and fixes associated to getting working data/MMS/SIM correctly configured along with restoring if you have issues can be found in the linked thread, mostly toward the end and not so much the middle.

***PREREQUISITES***

]1[-Rooted Galaxy S3(SCH-S968C) obviously, lol.

]2[-(Optional)If you're going to use PC to do your downloading and moving files then you'll need the "USB drivers for Samsung phones"(install on PC), download: HERE

]3[-ES File Explorer installed, download: HERE

]4[-Terminal Emulator installed, download: HERE

]5[-TWRP Manager or Flashify installed.

]*[ Download TWRP Manager: HERE

]*[Download Flashify: HERE

]*[(Optional)For those that manually download the .img with a mobile browser, it will be in your download folder, those with PC download it then transfer it to the device where you can find it, flash it with Flashify. Download TWRP .img: HERE.

]6[-CDMA 3G/4G/LTE SIM(absolutely MUST have a SIM or you won't get mobile data/MMS to work), below is a list of SIMs that should work and the results of using them, you'll need a micro SIM or a full-size SIM trimmed to fit micro(a nano SIM with adapter to fit micro will work as long as it is a CDMA, not a GSM SIM).

]*[Previously activated Verizon 4G LTE SIM.($3-5 on eBay)
(results are APN settings are accessible and mobile data/MMS works correctly)

]*[New, never activated Verizon SIM
(most users with a new SIM have working mobile data(3G) but have had issues accessing APN settings to get MMS working, some have had no issue accessing APN settings, some users with a new SIM also had a random dialing issue that would dial a *2289X number, the cause was never identified, this issue doesn't happen with a previously activated Verizon 4G/LTE SIM).

]*[Straight Talk BYOP CDMA 4G/LTE SIM(not the AT&T/T-Mobile SIM, those are GSM and won't work)(I haven't been able to verify if there is a difference between used and new ST SIMs but mobile data should work and if APN settings are accessible you should be able to get MMS working, hopefully users will post their results here with new and used ST SIM).

]7[ (Optional)-Titanium Backup installed, download: HERE

***PREPARING BEFORE FLASHING***

***NOTE***For the users that don't have a PC to do their downloading and file moving, I'll provide instructions for using ES File Explorer to do everything.***NOTE***

***NOTE***You can use your PC instead of ES File Explorer for everything EXCEPT copying /efs, this step will be done using the device to keep it simple for those that don't have PC and because PC method to pull a copy of /efs is a bit technical for the average user, I will only be explaining for using ES File Explorer.***NOTE***

]1[-For steps later in this guide(and for general purposes), you'll need to enable Root Explorer and mount R/W in ES File Explorer. To do this open ES File Explorer and tap the menu button.

]2[-Tap the "Tools" tab.

]3[-Scroll down the menu and tap the words "Root Explorer"(not the toggle switch), it will turn on when you tap the words(grant superuser/root permission if prompted).

]4[-Tap "Mount R/W".

]5[-Your list of partitions may be different than mine but generally you want all partitions EXCEPT firmware-mdm set to RW as shown in screenshot. Tap OK when done.

]6[-It is recommended to make a NVdata backup to protect IMEI then save a copy of your /efs folder before flashing custom ROMs. IMEI is very easy to lose depending on what you flash and the order you flash it in with this device.

]*[(RECOMMENDED)Comprehensive guide to backing up IMEI/efs HERE

]*[For those that don't have a PC, open the Terminal Emulator app and type:

su(press enter, grant superuser/root permission if prompted)

Then type:

reboot nvbackup(press enter, the device will reboot).

]*[This saves NVdata/IMEI to be restored later if flashing wipes IMEI, instructions for restoring posted below in TROUBLESHOOTING).

]7[- It is also recommended to save a copy of your /efs folder on your extsdcard, we will use ES File Explorer. Open ES File Explorer and take note of what your extsdcard is labeled as and remember it, you'll need to know this later, then swipe from right to left to go a page over.

]8[-Tap the / symbol.

]9[-Press and hold the /efs folder to highlight it then tap the "More" button at the bottom.

]10[-Tap "Copy to"

]11[-Tap the arrow at the top left(what it says will be different depending on the ROM you're using).

]12[-Remember the name of your extsdcard? Select your extsdcard.

]13[-When you get to your extsdcard, tap "OK"(Those with PC can now connect to PC and save a copy of /efs on PC, you may have to enable MTP in the USB options that pop up when you connect device to PC to grant the PC access to device storage).

]14[-Open Titanium Backup(grant superuser/root permission if prompted while using Titanium Backup), backup all apps/data/settings you want to keep(Follow the guide I linked to determine what you want and what is safe to restore after flashing a new ROM, some things won't restore in a new ROM without causing issues), instructions for using Titanium Backup HERE.

]15[-To simplify moving files and to keep everyone on the same page when finding your files when you flash them we will create a folder on extsdcard and name it ABC(or whatever you want as long as you know which one it is), this will make it easy to find in TWRP when you flash your ROM.
Open ES File Explorer and select your extsdcard.(Those with PC can use PC to do this)

]16[-Tap the "New" button.

]17[-Tap "Folder".

]18[-Name the folder "ABC"(or whatever you choose) then tap OK.

]19[-Download the KK/LP/MM d2lte or d2vzw ROM(s) of your choice and store it/them in the folder you created on your extsdcard. You will find ROMs, custom recoveries, custom kernels and various other mods that can be used on the SCH-S968C in the links below.

]*[ROMs+other mods: HERE

]*[More ROMs: HERE

***EXTREME CAUTION***(DO NOT use anything that says STOCK/STOCK based or TW(TouchWiz) in its name, nothing that says firmware or modem, nothing that mentions Safestrap Recovery or Flashfire, locked Bootloader(BL). All of these things are specifically for the Verizon SCH-I535 and will almost certainly lead to hard bricking your device if you attempt to use them.***EXTREME CAUTION***

]20[-Download the appropriate Gapps for the ROM(s) you chose and store it/them in the folder you created(the version of Gapps you need should be mentioned wherever you get your ROM from).

]21[-Charge battery to full.

]22[-Now you're safely prepared to start the flashing process, proceed to the next steps.

***FLASHING TWRP***

It is recommended to always use the newest version of TWRP available for best results. If you already have the newest version then skip to FLASHING YOUR ROM, if you don't have it then follow instructions below.

To make this easy for those that are new or don't have a PC, we will use TWRP Manager or Flashify to flash TWRP, or by manually downloading the TWRP .img(linked above) then flashing it in Flashify.

***FLASHING WITH TWRP MANAGER***

]1[-Open TWRP Manager(grant superuser/root permission at any time while using TWRP Manager). Tap "Device Name".

]2[-Scroll down the list and select "Samsung Galaxy S3 Verizon d2vzw".

]3[-Tap "Recovery Version to install".

]4[-Select the newest version available.

]5[-Tap "Install Recovery".

]6[-The .img will download.

]7[-When the .img downloads it will prompt you to verify the partition to flash to, verify you have the same thing and tap "yes".

]8[-When the .img finishes flashing, you will be prompted to reboot to recovery, tap "yes".

***NOTE***Skip to BACKING UP YOUR STOCK ROM if you used this method to flash TWRP.***NOTE***

***NOTE***If you've tried this and you're having issues with this method, refer to the method below***NOTE***

***FLASHING WITH FLASHIFY***

]1[-Open Flashify and tap "Recovery Image"(grant superuser/root permission if promoted while using Flashify).

]2[-If you manually downloaded the .img(linked above as an option in PREREQUISITES), tap "Choose file", then select it from your download folder or wherever you stored it then skip over the next two steps below this one for downloading the .img in Flashify.
If you haven't manually downloaded the .img, skip this step and go to the next step to download the .img in Flashify.

]3[-Tap "Download TWRP".

]4[-Select the newest version available.

]5[-The .img will download(it will be downloaded in /flashify/recoveries/twrp/ folder if you ever need to find it.

]6[-When it downloads or when you select the .img from storage, it will prompt you to flash the recovery.img, tap "yup".

]7[-After it flashes, tap "Reboot now".

]8[ Proceed to BACKING UP YOUR STOCK ROM.

***BACKING UP YOUR STOCK ROM***

]1[-When you are booted to TWRP, if you are still on stock and you haven't made a NANDroid backup, make it now by selecting the "backup" option before you flash anything!(Very important step)

]2[-Tap "Select Storage".

]3[-Select your extsdcard(Micro SDCard), select OK.

]4[-The default partitions selected to backup are fine, swipe the slider to confirm, this NANDroid backup can be used at any point in the future to restore the device to stock if you have issue or ever want/need to.

]5[-Press the Home button in TWRP to return to the Main screen and proceed to FLASHING YOUR ROM.

***FLASHING YOUR ROM***

]1[-While still in recovery after making your stock NANDroid, remove battery cover and insert SIM then replace cover.

]2[-Tap "Wipe".

]3[-You'll see "Wipe Data, Cache and Dalvik(not including internal storage)" at the top, swipe the slider to perform the wipe and wait for it to finish.

]4[-Tap the Home button in TWRP to return to main screen, select "Install".

]5[-Select "Up a level".

]6[-Select "external_sd".

]7[-Select the "ABC" folder you created(or whatever name you chose for the folder, scroll down the list if needed).

]8[-Select your ROM.zip.

]9[-Tap "Add more zips".

]10[-Select your Gapps.zip.

]11[-Swipe the slider to confirm the flash.

]12[-After flashing, tap "Wipe cache/dalvik".

]13[-Swipe the slider to confirm.

]14[-Tap "Reboot System".

]15[-Wait for the phone to boot(It will take 10-20 minutes to fully load), when it boots into Setup Wizard, stop and watch the status bar Network Signal icon, wait for the device to detect the SIM, when the icons shows a signal(and 3G if you're lucky, if you are not getting any 3G then just get on WiFi to finish setup if you have WiFi or if you don't have WiFi, skip setup and go on to SETTING UP DEVICE AND SIM, you can sign in to Google to finish setup after you get the SIM and APNs set up), then go through Setup Wizard to set up the device and sign in to your Google account. When you're in the phone, continue to setup steps below.

***SETTING UP DEVICE AND SIM***

***NOTE***Your system settings may look different depending on your ROM but the settings should be the same or similar, find the settings described wherever they are in your ROM and set them to what is posted.***NOTE***

]1[-Go to System Settings>About>Build Number.

]2[-Tap build number at least 7 times quickly to enable Developer Options(you'll get a toast message saying you have enabled development options).

]3[-Go to System Settings>Developer Options.

]4[-Set Root Access to "apps and adb".

]5[-While still in developer options, verify USB debugging is on(neither is needed for setup but turning them on now prevents potentially confusing issues later).

]6[-Open your dialer app and dial:

*228(if your SIM is a Verizon SIM), press send, this programs the SIM, hangup when done.

OR

*2289X(if your SIM is a Straight Talk SIM(or any other Tracfone variant CDMA SIM). I can't confirm the actual number, I haven't used this SIM), if your SIM is a ST BYOP CDMA 4G/LTE SIM then this number should program the SIM, I can't confirm that though, if it doesn't we'll have to hope someone that used ST 4G posts what they had to do, hang up when done.

]7[-Go to System Settings>Mobile Networks(tap the words, not the toggle switch.

]8[-Set Preferred Network to "3G".

]9[-Set CDMA Subscription to "NV".

]10[-Select Access Point Names.

]11[-Then select one of the existing APN sets on the list(any set, it doesn't matter, do not create a new set, you have to edit an existing set or they won't save, your list won't look the same as mine).

]12[-Edit the APNs using either set I have posted, the Tracfone set should work on all Tracfone network variants. Change only the values listed.

]*[Tracfone APNs, enter the name of your Tracfone network Carrier variant in the Name value(These APNs are for all Tracfone devices including BYOP devices).

Name: (Your network variant)
APN: tfdata
Port: 80
MMSC: http://mms-tf.net
MMS Proxy: mms3.Tracfone.com
MMS Port: 80

]*[Verizon APNs(these will also work on the Tracfone variants since they are on Verizon towers).

Name: verizon
APN: internet
MMSC: http://MMS.vtext.com/servlets/mms
MMS port: 80
MCC: 310
MNC: 012
APN Type: internet,mms

]13[-When you've entered the APNs, tap the menu button.

]14[-Save the edited APNs, the set you create might disappear but they are still there and will still work as normal.

***NOTE***If you flashed a 4.4+ ROM first and now you want to go up to 5.0+/6.0+ and you have working data, now would be a good time to reboot to TWRP to flash the 5.0+/6.0+ ROM and Gapps like instructed in the above steps. When you get them flashed, do these same steps to make sure everything is set where it needs as you go back through everything.(or dirty flash with no factory reset, only wipe cache and dalvik after flashing and ONLY as long as it is an update to the same ROM you are using, for example, CM11 to CM12 or AICP 5.0 to AICP 6.0, hopefully dirty flashing will let you keep APNs configured in some of the newer ROMs that don't give access to APN settings instead of having no way to change APNs in your new ROM, also, some of the ROMs don't have the settings built in the ROM because they have World APNs so shouldn't need the settings configured)***NOTE***

]15[-Reboot the device to reload settings.

]16[-After the device reboots you should have working mobile data and MMS(You can sign in to your Google account now if you had to skip it in setup), install Titanium backup using the copy of the app you placed on extsdcard then open Titanium Backup and restore all the data you backed up in Titanium Backup, reboot after restoring data from Titanium Backup.(You will need to go to System Settings>Security>Unknown Sources and turn it on to install Titanium Backup if you're installing from a copy you manually saved, or you can install it again from the Google Playstore)

]17[-Remember to set Root Explorer and mount R/W in ES File Explorer as described in PREPARING BEFORE FLASHING section posted above before proceeding to the next step.

]18[-Once everything is set up the way you want, mobile data/MMS are correctly configured and all data is restored from Titanium Backup, you can boot to TWRP and make a new NANDroid backup of your custom ROM with everything working, this can also be used to restore later if you have issues. Remember, at this point you should have a stock NANDroid backup and a custom NANDroid backup if you've followed the instructions, either can be used when/if you need it. Reboot after making the new NANDroid backup.

]19[-Enjoy!!!

Ink'd from my KrAkEn'd S3

Apr 3, 2016 View

2

Ibuprophen

It may me being a bit lost here...

I just wanted to provide the following regarding what I've located.

You can obtain the Unmodified Stock Firmware for/from the following links:

There's only 1 Tracfone Firmware for the SCH-S968C (Samsung Galaxy S III - Tracfone Service)
https://samfrew.com/model/SCH-S968C/region/TFN/

The following reflects 3 variants to the SPH-L710 (Galaxy S 3 LTE - Sprint Services)

https://samfrew.com/model/SPH-L710/

The following reflects 2 other variants to the SPH-L710T (Samsung Galaxy S III - BoostMobile & Sprint Services)

https://samfrew.com/model/SPH-L710T/

I do know that SamMobile had Archived one or more (i believe all - for Paid Premium Only) of the above device variants but, your able to download the firmware via the links above (free of course).

I do know that samfrew is reputable as I've confirmed various firmware downloads there as well as being in touch with the Admin there on a few occasions.

I hope this was helpful in some way for you!

Good Luck!

~~~~~~~~~~~~~~~
Unless asked to do so, PLEASE don't PM me regarding support. Sent using The ClaRetoX Forum App on my Apple Macintosh.

Jun 25, 2019 View

2

Droidriven

noidodroid said:

Nope. Didn't flash the d2vzw modem but rather another from TFN firmware I have. I am thinking what did it wss the MicroG kernel mod to allow MicroG to run but still doesn't make sense to me. You are right the system.img is similar. I am getting nothing at all but Qualcomm 9008 mode right now so thats why i know it is hardbricked. Thank you a ton for the debirck image. I will give it a try now and see if it works out. If i have to resort to Jtag I will just try to find another bootloader unlocked logic board or another S3 with a unlocked bootloader (hopefully i can). A Riff box is on my list of equipment to buy sometime when i get to where i have time to train myself. No stranger to EDL or testpoints but Jtag'ing is a whole other other learning curve. Not too difficult just need the right hardware, software, patience and semi decent soldering skills. Riff box now has a usb solution that requires no soldering from what I was told recently so might be worth an early investment.

Debrick thread - Do you mean this one? https://xdaforums.com/showthread.php?t=2581166

If so yeah that is what I have been following. It's similar to how I did a Alcatel One Touch years back.

Click to expand...

Click to collapse

Yes, that is the correct thread. Good luck.

I wasn't aware that there is another Tfn firmware for d2tfnvzw. Where did you get the firmware? Are you sure it wasn't the firmware for the Sprint variant S906L? Using that firmware would have surely bricked your device.

Sent from my Amazon Tate using Tapatalk

Jun 25, 2019 View

2

Droidriven

Ibuprophen said:

It may me being a bit lost here...

I just wanted to provide the following regarding what I've located.

You can obtain the Unmodified Stock Firmware for/from the following links:

There's only 1 Tracfone Firmware for the SCH-S968C (Samsung Galaxy S III - Tracfone Service)
https://samfrew.com/model/SCH-S968C/region/TFN/

The following reflects 3 variants to the SPH-L710 (Galaxy S 3 LTE - Sprint Services)

https://samfrew.com/model/SPH-L710/

The following reflects 2 other variants to the SPH-L710T (Samsung Galaxy S III - BoostMobile & Sprint Services)

https://samfrew.com/model/SPH-L710T/

I do know that SamMobile had Archived one or more (i believe all - for Paid Premium Only) of the above device variants but, your able to download the firmware via the links above (free of course).

I do know that samfrew is reputable as I've confirmed various firmware downloads there as well as being in touch with the Admin there on a few occasions.

I hope this was helpful in some way for you!

Good Luck!

~~~~~~~~~~~~~~~
Unless asked to do so, PLEASE don't PM me regarding support. Sent using The ClaRetoX Forum App on my Apple Macintosh.

Click to expand...

Click to collapse

Yeah, there should only be one stock firmware available for S968C, the "H1" firmware as we have come to call it. The closest variant would be the I535 since the S968C actually has a I535 motherboard with a modified radio.

The L710 d2spr firmware "might" flash but would not have everything working correctly. The other d2 variants might flash but I doubt it, if they do, they would also probably not have some things working. I would imagine that some of them won't flash or will brick the S968C due to potential bootloader differences, partitioning differences due to android versions all having different partitions(which requires an appropriate PIT that matches your partition order) and/or potential Knox/Qfuse being tripped. That last one is bad juju, my friend.

The biggest reason for the differences is that the partitions are not the same for all d2 variants. For instance, the recovery partition on d2tfnvzw S968C is mmcblk0p18, but is 0p13 on the d2spr. I believe the I535 is different than both of them but I'm not sure. And that is just the differences in locations of recovery, not to mention bootloader, modem or system, likewise, their locations would be different between the variants.

Those are my thoughts on it anyway.

I'm certain that the system.img can be swapped around on all the variants without issue, if one were to properly extract, port system and compress the modified firmware using the other system.img in the place of your original stock system.img. I'm pretty certain that the modems can't be safely swapped, especially not the bootloaders because some of them are locked and others aren't

Sent from my Amazon Tate using Tapatalk

Jun 25, 2019 View

2

Droidriven

noidodroid said:

Hey there. I have made a LOT of progress. I have a 12GB Repo all organized, dualboot and multiboot i was modifying a bit, roms, recoveries with two more i got to work on this variant, twrp themes, and more. Even a custom color battery door and custom color outlined 9h glass screen protector ready to order. Unfortunately I hard bricked it when flashing some files (not sure which in the batch of zips flashed did it just yet). I got to MM 6.0 on a few Roms still getting a signal (no 3g though) keeping all info, serial, mac, imei etc intact. Still trying to revive my TFN Samsung Galaxy S3 but so far trying with Sandisk microSD cards and 3 or 4 d2vzw debrick files none have have worked. Someone suggested i try an actual Samsung microSD 16gb card instead as that will work. I don't see why it will make a difference though. I'll post full details in here or in a thread here soon.

Click to expand...

Click to collapse

The Verizon(d2vzw) debrick imgs won't work. It has to be a debrick file that has been dumped from a rooted S968C(d2tfnvzw) that still has the stock firmware installed. The file will be a debrick.img or a debrick.bin file, either will work.

I might still have a copy somewhere or I can try pulling another copy from the device, I still have it.

Side note, you can't flash anything that has been derived from stock Verizon i535(d2vzw), including all of the i535 TW modified stock ROMs, they will brick the S968C. Only the d2vzw Cyanogenmod(CM) and d2vzw LineageOS(LOS) custom ROMs can be used on the S968C. You can't flash any of the stock Verizon files on the S968C, none of them.

Sent from my Amazon Tate using Tapatalk

Jun 24, 2019 View

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