I've finished my contract with Optus (Australia) and enquired about having my iphone 4 unlocked which was no problem & then I was told I just need to do a restore via iTunes to complete the unlock proceedure. Why should I have to do that? Of course this will wipe my JB & update me from 5.1.1 to 6 point something for which there is no JB to my knowledge at this time. I do not want to stay with Optus as there are amaysim and dodo pre paid options with unlimited talk n text with 2-3 more GB per month all for $20 less per month than Optus plan, and they use the same Optus network! What's this scam of having to restore via iTunes to complete the unlock? Any ideas?