Unity 4.x Upgrade

I have Unity 3.5 iOS basic license which i got free. Now i want to purchase unity 4 license.
I want to know if i purchase unity 4 pro license then would i get unity 3.5 pro license until unity 4 launched?

See Here : Unity Pro

2/ For how much longer will I be able to purchase 3.x?

For new customers: As of June 18, the sales to new customers of 3.x products will be discontinued in the Online Store and only Unity 4 products will be available for pre-order in the store. From June 18 until the official release of Unity 4.0 any new customers that pre-order Unity 4.0 automatically get a Unity 3.5 license for immediate use. That way, they are able to start creating their content and transfer it when their Unity 4.0 license is activated.

For our current pro customers: As of June 18th, Unity Pro 3.x will no longer be sold in the Online Store. Unity Pro 4.0 will be available for pre-order.