AT&T charges $25 per month for a 2GB per month iPhone data plan. Their iPad 3G plan has the same plan. However, for a brief shining moment (about a month), AT&T offered an unlimited 3G data plan for the iPad that some subscribers are still grandfathered into as long as they don’t interrupt the month-to-month plan. The Wall Street Journal reports that Verizon will offer a $30 per month unlimited data plan for an unspecified limited period.
MacWorld reports that an add-on mobile WiFi hotspot plan will be priced at $20 per month.
The hotspot feature resembles Verizon’s MiFi service: Use up to five WiFi devices with the hotspot service. Unfortunately, the hotspot service is limited to its own 2GB per month of bandwidth. This means Verizon iPhone 4 owners with an unlimited 3G data plan will still be limited to 2GB when wireless tethering other devices. I have to admit, however, $50 per month for both unlimited iPhone 4 3G data and 2GB of shared hotspot data does have an appeal for someone like me who only needs to tether other devices a few times a month.