For modern Sony (formerly Sony Ericsson) devices, the official Xperia Companion
: Resetting security codes when users were locked out of their devices. Supported Devices and Legacy SonyEricsson USB Smart SEMC tool v8.4 Cracked -3653917-
: Ensure the correct USB cable drivers are installed on the PC. Connection : The phone must typically be powered off. For modern Sony (formerly Sony Ericsson) devices, the