Bootloader/Custom Recovery question

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http://forum.xda-developers.com – Hi, I've read and searched about rooting or unlocking a refurbished phone should be okay to do, i just want to know for sure if I will be okay. My one x is refurbished and would like to know if I can install viper Rom with no troubles, will I be able to unlock bootloader and flash custom recovery? I just want to be safe Sent from my HTC One X using xda app-developers app (HowTos)