I wonder if anyone can help me here, i have successfully returned to stock following this guide but have a big problem. I cannot get into recovery at all to do the factory reset. My phone boots but an error message pops up saying system.ui not responding and it does not go away, it needs to be factory reset but i cannot get into recovery. Is there a way to flash the stock image and reset the phone via R&D tools? or is there any other way to reset? any help would be appreciated.