[Sony Xperia P, U, Sola, Go] tommyrumbler:
(Hi MODs - first off, i am not sure if i am breaking any rules by posting this here. if i am - kindly delete the thread and accept my apologies.

the reason i am posting this here is because there are a lot of XS and close variants of the device asking me via PM of i am seeing some thread where they are requesting for info on how to unlock the bootloader for the Xperia 2012 line up)

(I will be sharing how i got my phone (Xperia Acro HD SO-03D) SIM-unlocked and Bootloader status changed from "unlocked allowed = no" to "... = yes")

Disclaimer : This is a paid service. i am in no way connected to the person or business entity doing the unlocking (and getting all the revenue from it ) - this is merely an alternative means to achieve what every one wants (carrier-free and bootloader unlocked) - but then again, it will cost you roughly 45US$. if this is ok with you, read ahead. if not... please look somewhere else.

it will be worth it or i will not suggest it.

my SO-03D which is the Japanese variant of Xperia Acro S was SIM-locked to Docomo since it is a carrier subsidized model. the default status of my bootloader was "unlocked allowed = no". after i successfully SIM-unlocked it using ezSEMC tool.. the status of my bootloader is now "unlocked allowed = yes". it's like having your phone factory unlocked.

you may get the unlock code from your provider (for a certain fee)the thing is, that code from your provider will only alter SIMlock.TA from your system, and will not in anyway rewrite CSCA, which is the certificate which keeps your bootloader locked and stays that way. so you will only have your phone sim-unlocked but bootloader status will remain " ... = no".

better that you use ezSEMC then. dig?

the entire process is painless and quick. you email the admin at this email address, then request an unlocking service. provide your phone model and to which carrier it is locked. he will make you download the software you will use to unlock you phone. the software will ask for a username and password. that will be sent to you by the admin after you pay 45US$ via Paypal.

all you need to do after is login to the software using the credentials he will send you via email, (you have to have good internet connection on your laptop as the software will authenticate the credentials to an online server.) The CSCA data will be sent also via the server and instructions will be shown to you on the screen on how to connect your device to your PC.

Steps:

1>Input username and password first on the box provided - then click on "Check Credit" button to make sure you got enough credit for the service

2> Connect your phone (your phone must be in flashmode - vol-down then USB cable)

2>Make sure you set the drop-down phone model to match your device

3>Set the radio button to "full-unlock"

4>Click "Identify" (after "Identify" button is clicked and the tool is able to communicate with your device - the "unlock" button (previously grayed out) will now be available)

4>Just click on "unlock" button and the process will take only 45secs. you got your device SIM-unlocked and bootloader unlock allowed = yes

i hope this helps you.