Customers in China and Hong Kong will be able to reserve the iPhone 5s or 5c online starting at 6 a.m. tomorrow — Tuesday, Sept. 17. Most customers worldwide are only able to reserve the iPhone 5c at this point, with no preorders being taken on the 5s. The Chinese release date for both devices is Friday, Sept. 20. Customers who reserve a device online will be able to pick it up on Sept. 20.