Summary: I have owned 2 Nuvi 2597 and they are great navigators. But, the bluetooth speakerphone feature will not answer calls on either GPS speaker. Dialed calls can be made and will go thru speaker. I contacted Garmin support, they answered quickly. They declared the answering feature is not supported on 2597, but is supported on older 2595. I purchased a new 2595 and the handsfree phone answering and calling feature works beautifully. OK with both iphone 3gs and 4.