Unlock XPERIA - How to enter unlock code?

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Hey there,
I've done a quick search of the forum but I cannot find the answer I'm looking for.

I'm trying to unlock an O2 branded XPERIA.
First, when I put a different SIM from another network, it still boots up but receives 'No Service' so I assume it's locked.

I've got a code from HTCCode but I have no idea how to enter it,
Could you guys help me?

Cheers,
Hyped

Cant you ask the person you got it off?

they'll just give me the same instructions that are on the website.

I trust XDA Developers more for better information

Wouldn't it be possible to unlock the phone by flashing the firmware?

just flash a rom.. will automaticaly unlock ur device

NATAO

i'm pretty sure that flashing a rom doesn't unlock your device...

simply put foreign SIM card in the phone. Upon boot it will ask you to enter the code. Enter the one you got from HTCunlock.

btw - flashing the phone has nothing to do with unlocking.

If you have a code means You can enter it using the instructions below and unlock it step by step...You can get the free unlocking instructions and paid unlock code from the site www.mobile-unlocker.com and unlock your phone....

Warning : Do not enter any wrong unlock codes on your Sony Ericsson Xperia mobile phones. If you enter over a certain amount of wrong unlock codes on your Sony Ericsson Xperia mobile phone, your phone may get hard locked and sometimes become unusable.

1 - Switch ON your Sony Ericsson Xperia without any SIM Card,
2 - Press the left arrow key/button once,
3 - Press the button * twice,
4 - Press the left arrow key/button once,
5 - The message "Personalize with MNC2" will appear, (or you will have displayed an unlock menu, select the lock you want to unlock)
6 - Enter the Unlock Code.