Sooo I Have the samsung galaxy s3 S968C Model (straight talk model) and i Dont know how to put cynogenmod on it can some one please help me?!?!?
From what I've read the D2VZW ROMs work on it but remember to always make a backup and look at some Verizon ROMs as well
So to put CyanogenMod on it we need a custom recovery.
Now first some knowledge on the phone, apparently it's the Verizon variant rebadged.
To install CWM (Recovery) we have to root the phone, to do this use the Cydia Impactor method by Saurik:
http://www.cydiaimpactor.com/
Once rooted use EZ-Recovery (
https://play.google.com/store/apps/details?id=com.mmmeff.ez&hl=en) to install CWM. You MUST use the VERIZON recovery and NOT the Sprint as it WILL brick your device.
After that you should have ClockworkMod Recovey on your device, to check just boot into recovery by holding down the Volume up, home button and power for a few seconds. Once loaded make a Nandroid backup and when in the normal phone ROM copy it to PC incase of issues
Now that CWM is installed just copy your chosen ROM and Gapps file to your SD and boot into recovery, choose the wipe data/factory reset option and wipe cache. Then choose to install your ROM and Gapps.
Hopefully this should work and you now have CM installed
Hope I could help and good luck with your phone.