The subscriber identity module (SIM card) in use in LG's Global System for Mobile Communications (GSM) cellular mobile phone handsets allows you to copy a phonebook to and from a SIM card and LG phone. This is a useful feature for making a backup—you can have two copies of the phonebook, one on the phone and one on the SIM card. It's also useful when you want to change phones—just copy the data over from the old phone to the SIM card, copy the SIM card data to the new phone and store the old phone—complete with a backup of all your numbers.
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Click on the LG phone's Call Menu icon. It has four dots and refers to the menus related to call, message and instant messaging (IM.)
Select the "Address Book" label or icon. It will be the next label or icon after "Dial" and before "Recent Calls." The icon looks like a phone book.
Choose "Copy All Contacts."
Click on "Handset to SmartChip." SmartChip is LG-speak for SIM Card. The name and phone number entries will copy to the SIM Card. If a name is duplicated, then the phone will copy the duplicate information. You will end up with two sets of the same data.