I had an enormous amount of trouble to get Google earth to work, but eventually the problem was cured via a software update.First of all, your phone must have a sim access profile facility. Most new Samsung phones (mine is a Galaxy Note 2) have this. Apparently the IPhone does NOT have this, so basically, you cannot get Google earth and other online services via Bluetooth from your iphone, and will need to use the separate SIM ( a real pain). Check this link
https://discussions.apple.com/thread/4987880?start=0&tstart=0Next, is the option to select google earth greyed out? Then check belowIn general, I suggest you try the following sequence first.1 Are you getting the online icon at the bottom left of the MMI screen?2 If yes, can you get traffic info on the map (via the same menu where you select google earth)?3 If you can get traffic info, but not google earth, then you need a software update (this is the situation that I had)4 If you are not getting the online icon, then check whether the Bluetooth connection is via Car phone and not Hands Free (go into the Bluetooth menu from phone settings, go to bonded devices, click on your phone, and a submenu will pop up. If it does not show "car phone" as an option, then you cannot get online/google earth via Bluetooth. If it does show "car phone" then select this, go back to the map screen, wait a minute or so until the online icon comes on the bottom left of the screen, and all should be ok.Hope this works, but as I said, it appears the iphone is incapable of being used to provide online services (including google earth) via Bluetooth, but I am only relying on online forum posts for this info, so may be wrong/obsolete.