This are a debranded STOCK ISC for Xperia U, so only the branding is removed, everything else is there.
They are rom.zip preroted, with cwm included and cwm flashable.
For all bootloders.
Im not responsible if you brick your phone, and if you do.. ITS YOUR FAULT
Put the zip on you sd-card , boot in to cwm, do all the wipes, install the zip, reboot, DONE!
You can (should) do a factory reset after a couple of (10-15)minutes , let it settle first.
6.1.1.B.1.100 on dev-host
lee480 for the b.1.100 ftf
saeed-constantine and Shisma for the b.1.89 ftf
atis112 and munjeni for the cwm recovery for locked BL