Hi all, my name's S373N and i'm new to this. I'm currently waiting on an unlocked 3G 8gb I purchased on ebay for 345 AUS and wanted to ask a few questions. Okay, so seeing its unlocked, its obviously not 3.1.3, but the fact that it has wifi greyed out implies its the software version that had issues with that. My question is, what's the highest (and stable) version I can upgrade the firmware to so I can unlock it to use any network sim? thanks so much in advance!