To debrand your phone use these files:

1. W580_R8BE001_MAIN_GENERIC_LA_RED53 (Downloads -> Firmware -> W580 -> R8BE001_RED53)
2. W580_R8BE001_FS_EUROPE_3_RED53 (Downloads -> Firmware -> W580 -> R8BE001_RED53)
3. HB1-06_Gen_CDA102568_12_R8A_GENERIC_EUROPE_3 (Downloads -> Custom Files -> w580custpack)

You have limit 100 MB/day from Download section !

USB drivers: w580_usb_signed_drivers.zip