Completly puzzled!!!

[Cake]

Getting puzzled after read previous posts about LG3G unlock.I've got following ideas:
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1.For U81** models ,we need flash DRIVEC with lowest version from support side.after that do read codes for unlocking.

2.For other models like U8330, we can do direct unlock if the phone is new and never be used. Otherwise, we need do full flash and do direct unlock after that. For U8330(R) ,we need TP for unlocking.

3.For LG3G phones which USB-SMART supported, we can do direct unlock for all of them.Don't need downgrade.
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for LG3g TOOL v2.8....which is correct ??? these ideas are all post by ppl from previous post! getting puzzled since i'm going to unlock some LG3G Phones.