Business customers at AT&T who want to use the iPhone 3G will have to pay two monthly fees - one for data, one for voice.
The voice plans are the standard plans already offered by AT&T to its business customers.
To add an unlimited 3G data plan to support the iPhone 3G's increased speed, business users will pay US$45/month.
There is also a one-time $36 activation fee associated with new phone activations.

