Yes, you can subscribe to all the available data packages, Blackberry services, value-added services. However, you cannot subscribe to the New Postpaid add-ons.
As long as you are changing to either Smart 300, Smart 600 and Smart 1000, your preferred number will be automatically migrated. If you choose any other plan, you'll lose the benefits of the preferred number and will be charged at regular national calling rates.
Yes you can and there are no early exit charges if you are upgrading your plan to Emirati or New Postpaid plans.
If you migrate to Freedom plans, you will need to settle the early exit charges as per your contract before migration.