Backup your cell phone data with BitPim

From Lifehacker

Free, cross-platform software BitPim lets you backup and manage your cell phone data (including contacts, calendar, wallpapers, and ringtones) on a number of popular phones.

It looks like BitPim supports mostly LG phones, but the list of supported phones does include several other phones as well. If you don’t like it (or if your phone isn’t supported), you might also want to try Yahoo! Mobile’s Contacts Backup.