This is how i managed to unlock my GS4 with a broken screen in order to back it up with Kies3. Items required: Usb keyboard, usb to micro usb converter, samsung hdtv mhl 2.0 dongle, hdmi cable
http://www.ncix.com/detail/microsoft-...
http://www.ncix.com/detail/c2g-6in-mo...
http://www.ncix.com/detail/c2g-4k-2m-...
http://www.bestbuy.ca/en-CA/product/s...