I had just unlocked the bootloader, and i had installed a new firmware 6.0.A.3.73 I read that if I performed unlocking the bootloader and installing a new firmware will unlock the cellphone but it didnt work. i think that the cellphone is hardlocked thats becouse i had tried that way. help me plz
Unlocking a bootloader won't unlock your Xperia S from network restriction. To unlock a mobile phone from network restriction, You need to enter its unique unlock code. You can get the unique unlock code for your Sony Xperia S from http://www.mobile-unlocker.com/sony-xperia-s/rs16wp9/ at affordable cost with free unlocking instructions. Good luck mate.
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Unlocking a bootloader doesn't unlock your xperia from network restrictions, you have to try with online services to get unlock xperia for a fee.
I used this website http://www.unlockcode4u.com/en/unlock-Sony to unlock my Xperia Z, quite good with quick response from the team there hopefully will be helpful to someone here