Nothing yet and also waiting for a call / email. I tried to get an answer from iStore via e-mail and they just directed me to the pre-order website page.
Please note the following:
• Although we have confirmed your eligibility for an upgrade, final confirmation from your network will be required once you have chosen an iPhone plan in store.
• Due to high demand, iPhones will be allocated on a ‘first come first serve’ basis.
• Don’t forget to bring all required documentation as listed below.