You seem to be very knowledgeable about this stuff, I NEED HELP!!!! Ive been jailbreaking and rooting phones for about 8 years or so and I made the dumbest error in the world.... Long story short, I tried to root my galaxy s3 and used wrong root... Im stuck in "firmware upgrade went wrong!!!!" (that's not exactly what iwww.sammobile.com/firmwares/1.?model=sch-I535t says but I think you understand), anyway, I can ALSO get to my downloading screen, but the long and short of it is I need the stock firmware to load through odin. My phone is a Galaxy s3 model # sch-s960L and its through straight talk / tracfone. since its through those carriers you know I spent 430 bucks on the thing and had it 3 HOURS before I BECAME THE DUMBEST PERSON ON EARTH!!!! I am afraid the stock firmware does not exist... I am willing to donate to ANYONE who can get my phone back to how it was before or even tell me how or where to look.... even tell me where to take the phone. If you can help, (I have never posted or asked for help so I don't know protocol) just email me at [email address removed]. I appreciate you even reading something that took pure ignorance to accomplish!!!