One of the two American GSM carriers, T-Mobile, will unlock handsets for those with active account in good standing for at least 40 days and no unlock code request in the last 90 days. The other, AT&T Mobility, is required to do so upon request (with some exceptions and requirements) after ninety days of active service under the terms of a class action settlement. Prior to the settlement, AT&T would usually do so once one has concluded their contract, and in some other situations. Neither carrier is compelled to unlock phones by any law or regulation, and they may choose not to unlock certain phones.--> AT&T had in the past stated that it would not unlock iPhones under any circumstances, regardless of the legality of doing so, even after customers are out of contract. However, AT&T has since announced that starting April 8, 2012, it will begin unlocking off-contract iPhones, provided that the customer's account is in good standing. AT&T also has an unannounced policy of unlocking iPhones for United States service members who are deployed overseas—even if they are still under contract.