We have additional, and slightly clarified, confirmation that current Unlimited Data Plan customers with Verizon will be grandfathered in, even if they upgrade to 4G later. According to a Tweet from a support representative from Verizon, if you are an existing 3G customer, and upgrade to 4G after July 7th, you will be able to keep an Unlimited Data Plan if you already have one with your 3G account. From the looks of the Twitter exchange, we have reasons to rejoice, and it would appear that Verizon may soon have a flood of customers rushing to sign up for Unlimited Data Plans before July 7th. Hopefully, that particular Verizon employee knew what they were talking about, and Verizon will live up to this. From the reports we are getting in the forums, many people have called in to Verizon themselves and are receiving similar confirmation.