Afaik there aren't any service agreements that prevent consumers from unlocking. Here's one: WIRELESS CUSTOMER AGREEMENT ("Agreement") 3.0 TERMS RELATING T

Afaik there aren't any service agreements that prevent consumers from unlocking. Here's one: WIRELESS CUSTOMER AGREEMENT ("Agreement") 3.0 TERMS RELATING TO YOUR DEVICE AND CONTENT 3.1 Your Device [...] You agree that you won’t make any modifications to your Equipment or its programming to enable the Equipment to operate on any other system. AT&T may, at its sole and absolute discretion, modify the programming to enable the operation of the Equipment on other systems. [discussion of SIM locks follows] https://www.att.com/shop/legalterms.html?toskey=wirelessCustomerAgreement&#38 https://www.att.com/shop/legalterms.html?toskey=wirelessCust...;