Best Final Fantasy on iPhone?

I'm looking to get a Final Fantasy for my iPhone. The only one of the older ones I've played was 6, but Apple only has 1-5. Which would you recommend?

How 'buggy' is iOS 7 for iPhone 5?

I want to know if there's anything wrong with getting it? Cause I want to get it, it looks beautiful! But I don't want to Ffuuck up my iPhone -.- any users have iOS 7? How good is it?

Buy Iphone here in Australia or in America?

I live in Australia and I will be moving to the States for 1 year. Should I buy an Iphone 4s or 5 once i get to america or should i purchase it in Australia. Is it actually cheaper in US? And are you able to buy it outright?

IPhone 5 can't hear anyone on FaceTime?

I can call people fine, and people on facetime can hear me perfectly fine, but I can't hear anything they are saying. I can see them on video chat and it seems to be working fine, but I can't hear a thing. Why would this happen? Its not just one person, its multiple. It randomly happened in a facetime with my friends a few minutes ago.

Transfer purchase without syncing to computer?

I have an iPod touch with an app that I bought a long time ago on it. The iPod is currently synced with another computer and I want the app to sync to my iPhone on my computer without syncing to my computer, as it will remove everything from it. The problem is, though, that iTunes doesn't think I've bought the app already and it charges me for it, but I have no money to buy it again. How can I retrieve the app from the iPod without the other computer and put it on my iPhone?