Verizon has now announced the pricing and specifications of 3G data "tethering" for the iPhone, and it exactly matches the existing plans for smartphone owners. The $20 per month option gives the built-in iOS feature -- which converts 3G data into a portable Wi-Fi network, allowing up to five devices to share a connection -- its own separate pool of 2GB worth of data, Macworld reports. This fee is in addition to the iPhone's required voice and data plans, but does not "borrow" data from the iPhone plan.