In a newly added iPhone frequently asked questions (FAQ) page of its site, AT&T today published a number of contract terms important to prospective iPhone buyers. Notably, the FAQ discloses both a 10% open box restock fee for returned iPhones and a limited 14-day return policy, shorter than the 30-day return policies often offered for mobile phones. There is no restocking fee for unopened iPhones. AT&T also notes that iPhone ships with a SIM…