I am potentially coming over from the droid. One major thing I like about the droid is the GPS and the way there are turn by turn directions. My wife has the iphone 4 and there arent the turn by turn voice or whatever it is called. Is there an APP that I can use for the TBT directions if and when I go to the iphone? Are there any other issues with the iphone that I should know? Just any advice or anything that you want to pass along would be great. Thank you and this is my first post.