[Q]Mini ST15i root / unlock bootloader

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http://forum.xda-developers.com – Hi guys... Last week my xperia mini ST15i just updated to 4.1.B.0.587 I am going to root, unlock bootloader and install custom rom on my phone, but looks like there is no clear instruction on how to root it... I did found some instruction though, but i am not sure which is good : 1) http://talk.sonymobile.com/thread/41119 2) http://forum.xda-developers.com/show....php?t=1568792 (Should I follow the method for 4.1.B.0.431 ?) 3) http://forum.xda-developers.com/show....php?t=1923409 Which method i should follow? And lastly, should I unlock the bootloader before root or after rooting (HowTos)