today after almost one year using the stock Android version on my Xperia Mini (ST15i, I was on Gingerbread) I decided to flash an official CyanogenMod ROM (CM7).
So I first unlocked the bootloader of the phone following the procedure detailed by Sony and then flashed the ROM following the default procedure explained in the CyanogenMod wiki page of the Xperia Mini.
Everything went alright but now when I turn my phone on after I input the SIM password I'm asked for a network lock, when I wasn't before.
I tried reverting back to the stock Gingerbread and things worked properly again. Trying a different version (CM9, also official) got me the same problem.
Am I doing something wrong? Or is there any step not documented in that wiki page I should know about?
Thanks for everything in advance.