You're in a bit of a bind here. You can use the phone to transfer numbers to the sim card, however, the sim card only holds one number per name. you have to choose which number you want to save with the name.
You can't use Desktop manger with Mac so you can't do a "backup." You can use PocketMac to sync your contact list with your Mac and then sync with a new phone (not sure about syncing with a Razr.)
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