Revision history [back]

I'm looking to buy a refurbished Sony Xperia 10, and as far as I know, you can't unlock the bootloader if the phone has been sim-locked at any time - i.e. If the refurbisher bought a sim-locked phone and unlocked it, Sailfish can't be installed because the bootloader won't unlock. Now I read somwhere months ago that you can enter a character combo in some interface in settings (possibly even need to enable developer mode first) and the output will tell you whether the bootloader can be unlocked or not. I've been searching for a while now for that key combination can't find it. Somebody help me out (don't judge if you find it quick&easy, my search fu is just bad)?