Why does your Iphone multiply contact entries for some contacts?

Answer It's either compatibile with International Mobile Telecommunications 2000 (IMT-2000 or 3G) and/or the phone is the third generation of it's model.

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If you are syncing your Gmail contacts over the air to your Iphone - when you add a contact on your Iphone does it get added to your Gmail contacts?

How can i copy my contacts from my SIMcard to my Iphone contact list?

On the home screen go to settings.The 8th option down is "mail, contacts, calendars"Click this.Now scroll all the way down. There 3rd to the last option is "import SIM contacts"Click that. And ther... Read More »

What does backing up your iphone do will it erase all my contacts/photos and whatnot?

No, it simply saves everything in a different location so that you do not lose it all should something happen to your phone.

How can you transfer your phone book contacts from one iPhone 3g to another iPhone 3g?

you would just have to retype them into the contacts list or plug both phones on for charging into the computer and drag the contacts from one to the other