For the sim card I believe you need the assistance of a 'website' (although I dont know if they actually work)
Or your network provider.
Who are you with?
As for the bootloader, head over to this website to unlock your bootloader with sony.
Note that it will probably void your warranty.
... Ok scratch that I cant post links
google this:
Sony unlock Bootloader.
the bootloader allowed is set to no, so i presume i have to unlock the phone before it will allow me to unlock bootloader. how come no one is working on to unlock this phone?
Guys What do you thing about placing a bounty for unlocking our devices? Maybe it will encourage devs?
Sent from my LT22i using xda app-developers app