According to earlier rumors the iPhone 4 data plans will be $29.99 and Verizon will also provide mobile hotspot for the phone wherein you can connect up to 5 different devices to make use of your phone’s data plan.
However, if you are an AT&T user, you will have to break your existing contract and then sign a new 2 year contract with Verizon. Also, the AT&T iPhone 4 will not work on Verizon since it is a CDMA network.
Considering how fast Verizon LTE network is, this should see a huge shift of customers from AT&T to Verizon. The Verizon iPhone page is already up and can be visited here, but pre-orders won’t open up till February 3, 2010 for new customers. Existing Verizon customers can also get an iPhone 4 from reserved quantity before anyone else. Sign up link for the same is present in the above URL.