I have an ATT i337 S4 (mdl baseband) running on T-mobile. Current setup was wicked 7.0 ROM with ATT kernel.
I was trying to change to cyanogenmod ROM and tried using my TWRP 184.108.40.206 to load the rom but it would flash it and gave me an md5 error. Supposedly this is a known issue with TWRP so most people recommend using clockworkmod recovery and I tried to load that using recovery tools. Recovery tools couldn't find the CWM image file but did find the 220.127.116.11 updated TWRP image file so I tried to update TWRP and when I did, I can't boot to recovery anymore and instead get the yellow triangle saying unauthorized software.
At the same time (ugh) I flashed wicked 8 ROM update and think I loki'd it (I am running wicked 8.0 now) but I forgot to run the att kernel afterward. The current kernel is 3.4.5 ... dirty ptmr3 ... N5110 #1. I think this is the standard t-mobile kernel which will obviously not work on my ATT phone.
The problem is, now I can't reboot into recovery mode. When I try, I get the yellow triangle "system software not authorized by ATT...". I don't know if the problem is with the bad kernel or with the updated 2.6.3 TWRP. The only way I can get around the bootloader problem is the hold down the down vol and home button, then the power button and that gets me into a "Warning a custom OS can cause critical problems ..." page. From there if I continue, I get the yellow triangle. If I hit the volume down button to cancel, it boots normally but not into the bootloader and I have partial functionality of my phone.
Where do I go from here? Odin to stock? Replace the bootloader somehow? Anything else?
I did do a nandroid of my system before all of this but for some reason I can't access my SD card. I can hit mount but nothing shows up on file manager. Will that backup replace the bootloader with the known good one? I could copy the backup to the phone memory and do it from there using titanium backup I think.