I just switched from Apple to Android, and need to transfer my contacts to my new Nexus 4. What is the easiest way to do this?
You can do it using iTunes and Gmail
If you have a Gmail account (If you don't have a Gmail account I suggest making one. It only takes a few minutes and will be useful in the future), connect your iPhone to your computer and open iTunes. Find the "Info tab" at the top of the iTunes menu bar, select “Sync Contacts With” in the drop-menu and select Google Contacts. Enter your Gmail account information.
Check your Gmail account to make sure all your contacts have been transferred, delete multiple contacts, and update any information that needs to be updated.
If you are setting up your Nexus for the first time, enter in your Gmail info when it asks you if you want to sync your phone to a Google account.
If you have already set up your phone, navigate to your settings menu, and select the “Accounts & Sync” option. This is where you can sync your N4 with your contacts, Gmail account, calendar and so on.