Question [Q] Xperia V OTA uptdate error


when I try to update my Xperia V OTA to 4.3 it downloads the update, starts to install, reboots and continue the install, but arund half way it stops, reboots and gives the message that the update was aborted.

I cannot update it with cable, because the microUSB-port is in some way broken and only loads the phone, not connects to (any) computer.

Anyone with any idea how to solve? Is it possible to put the update at a micro SD card or something?
Have tried to do a factory reset, but no luck.
Itīs noot rooted but I think the bootloader is unlocked(?).