Cannot boot into OS and cannot boot into recovery
I recently picked up an HTC One M7 for AT&T and I wanted to put a custom ROM on it. So I unlocked the boot loader and installed SlimKat. Then I rooted the device and then set S-OFF. After I set S-OFF I can only boot into the boot loader. The recovery takes me back to the boot loader menu (I have tried flashing a custom recovery multiple times) and there is the error "active cmdline overflow" on the bootloader. What can I do?
Any help is appreciated! Thanks!