How long does your iPhone internet search history stay in record?

I'm with Sprint and I was wondering how long they keep your record after you disconnect with them. We were thinking of switching to another company but I'm worried about my search history record, I don't want to say why but it's bad. So do they keep it forever or like after a few years or months it gets deleted (some people say between 3-5 years and others say forever, so I'm really confused)?

Not only do they keep a permanent record of it, they send copies of your history to all your teachers and relatives.

  • New to iPhone. Why did my search history show up on my iphone? I just got my first iphone. I plugged it into my computer, and I noticed that all the stuff I have searched showed up on my phone. Can anyone tell me why?
  • How to see full search history on iphone? When I say full search history I mean the search terms that come up below the search when I click on the search bar in Safari on my iPhone. This only shows like 10 of my previous search terms. Is there any way to see every search term I've put in? Even a third party app? P.S. My iPhone is jailbroken and I haven't deleted any of my browser history or cookies or anything.
  • How to delete search history on new YouTube iPhone app? Got the new iOS 6 update for my iPhone. The YouTube icon is no longer default, so you have to get the one from the App Store, which is quite different from the old one. Whenever you click on the search icon it comes up with a list of your entire search history. How do you delete/clear your history? I don't have an account, in case that helps.
  • How long does internet history stay on record with the ISP? I'm with sprint for my iPhone so I don't know if sprint has my record or if it's our internet company, but around how long do they keep your record? We're thinking of switching our phone plan but again I don't know if they're the ones that have our records or if it's our internet company. So around how often do they keep your record if you don't switch (like if I stay with the company how many years will they have my record?)