I have contacts on my iPhone and I want to put them on my computer. If I sync them in itunes will it delete?

Ok so I have contacts on my iphone and I want them saved to my computer. On the info tab when I'm going to sync in iTunes, if I click "Sync contacts with Yahoo Address book" is it going to erase the contacts on my phone and replace them with my Yahoo ones? BTW, the reason I am doing this is because THE PHONE DOES NOT WORK but I can still access the files with the wire so I can't download apps or anything!!! Read or Add Answers...

why does my iphone not let me sync with my windows contacts, calendars & mail?

Everytime i try to sync my iphone to my computer, it lets me sync my music & things, but when i click the info tab the whole info section is gray and it wont let me click anything under it. and when i plug my iphone in and it starts syncing, a tab saying syncing has been disabled on this computer pops up, do you want to enable syncing on this computer?" and i click yes. and then another tab saying "itunes was unable to load provider data from sync services" pops up help! Read or Add Answers...