How to add ringtones to my iphone 4?

I need some help can anyone guide me step by step on how i can add ringtones to my iphone 4 Please
no rudeness & thank you to the ones that help

AT&T iPhone 4s to Virgin Mobile plan?

I'm looking at Virgin mobile plans and noticed they have unlimited data. I'd like to use my iPhone 4s that I got through AT&T and get a virgin mobile plan. What I'm wondering, would this be possible or would I have to buy virgin mobile's iPhone?

How to transfer Videos from iPhone to iPad?

I tried Dropbox but it can only save the photos and not the videos. I transferred Both pictures and videos but can only save photos and not the videos. So is there any app that allows me to transfer videos from an iPhone to my iPad?

I got into the water with my iphone 4?

Yesterday i went to the pool and accidently went with my phone in my pocket about a minute or two. Its was off and had a cover at the time it can't turn on now its in a bowl of rice but the battery is in there and i can't get it off what do i do?