Change the language of your Sony Ericsson K858, remove the network operator logos, unlock internet data settings, and reset user lock codes with this easy to use firmware upgrade software! Sony Ericsson K858 firmware update software is delivered instantly to your inbox after purchase. Simply connect the USB data cable that comes with your phone to the PC, and run the debrand program. Once procedure is done you will have a fully unbranded Sony Ericsson K858 phone free from network operator logos!