When you send your iPhone back to Maxis. You need to present your warranty card along with your iPhone when claiming. Maxis will follow the warranty as stated on the warranty card. Therefore, the warranty follows the first unit. Reason is, even after they swap your unit for a new/refurbished unit, your warranty card isn't exchanged.

However, when you check in Apple's website. Your warranty will start over again because it's a new/refurbished (technically new) unit. But this can't be a basis for an extended 11 months of warranty because Maxis will only accept your iPhone with their (Maxis') warranty card which follows the first unit.

@vostro78: Refurbished unit looks new because they can't be replacing their customer's iPhones with used and scratched units... So yea, yours follows the 1st unit's warranty.