How much is the iPhone 4s in Hongkong?

How much is the 16gb, the 32gb and the 64gb?
And where can I buy the cheapest but brand new in Hongkong?
And how is it when converted in peso?

Added (1). *And how much is it when converted in Philippine peso?

Looking for good guitar tuner app?

I'm trying to save money so I'm looking for a proper and accurate guitar tuning app, I'm currently using Epic tuner but it doesn't seem to give an an accurate reading, can anyone recommend a accurate guitar tuner app for iPhone?

How to stop my iPhone from automatically transferring them to an iPod?

I own an iPhone 4 (iOS 6.1) logged into my iTunes account. My mum owns an iPod Touch 4 but it's logged into my account so we can just transfer apps I have purchased that might of use to her.

Any purchases or downloads I now make on my iPhone automatically appear on her iPod (I'm guessing due to the fact it's logged into my account) but I would prefer this didn't happen.

Anyone know if there's any way around this? Turn off something? Does it have anything to do with iCloud? Tried Googling and going right through the settings of both devices but can't seem to figure it out.

How should I charge my iphone 5 on its first charge?

I heard that I should charge it for at least 12 hours before I use it. And then I heard that I should just charge it after I drain the battery.

What should I do?

Added (1). If my iphone is already at 100% charged when I first take it out of the box, should I still charge it?

Pre-owned iPhone from Sprint?

Would you recommend buying a pre-owned iPhone 4s from Sprint? I've heard that pre-owned iPhones aren't bad, but I'd like to hear from people with firsthand experiences with Sprint's pre-owned products (are they as good as new, did you have problems, etc.).

How to use iphone 3g without getting charged data

HI! I have an iphone 3g and was wondering if there was a way i could use it without getting charged data, I'm barely paying for the pone i have now without any extra charges, so is there a way i could use the iphone without getting charged? If i jailbreak it or unlock it can att still pick up that i'm using an iphone?

Added (1). Someone said i couldn't get free data, they mis-understood my question. I don't want free data, I want NO data.