How to keep my iphone contacts from deleting themselves everyday?

My iphone contacts keep deleting by themselves everyday, i put them on again and on the next day i use my iphone and they're still there but then in a couple of hours they are deleted again.

Maybe you didn't exactly save the contacts or go and check out the 'settings' maybe you should modify something there or for better results go to the service centre

  • Why does my iPhone keep deleting my contacts? Hi, about once a week my phone has a complete epi and deletes all my phone contacts! I will just go on my phone one day and my phonebook says 'no contacts'.It's so annoying because when I try to do a computer back up to regain the information it takes hours. Is there some sort of reboot I can do that will solve the problem but won't delete all my phones data? Or does it need some sort of professional repair?
  • What everyday items do we use today that we didn't have in 2006? I'm making a youtube video about things that werent around or popular when I was 16 (in 2006) that are extremely well known or used by to the everyday teenager in 2013 Examples: Iphone Justin Bieber Facebook Twitter MySpace was number 1 lol Any other things you may have in mind?
  • My contacts keep changing into my parent's contacts? I'm using my Dad's old iPhone 4, so it has all of his data. I cleared out everything that was his but I hate the part where each time my parent's add a new contact to their phone, everything syncs over to my contacts, so I'm scrolling down my list and see a new person I don't know but my parents do. Is there a way to change this?
  • How to stop 02 from taking £1 of my credit everyday for 50mb? I got a iPhone a few weeks ago and put £10 credit on but everyday I got this alert from 02 that they have taken £1 of my credit to use for 50mb please tell me how to stop this as it is making me run out of credit quickly thanks in advance