So I recently bought RAZR MAXX HD (locked) and while I was fighting with tz kernel I bricked my phone. It's currently in QHSUSB_DLOAD mode (when you connect usb cable) and black screen. So I decided to look for JTAG connector. Anyway, I found one place that looks like jtag connector (maybe it's jtag, maybe it has uart on it). I hope it's similar to Moto X jtag and I'll be able to get uart out of pins 13/15. Will be testing tommorow.