You can still Unlock all iPhone from AT&T USA
But now you can also pick the Price & Quality of service you need
– AT&T USA – iPhone 2G, 3G, 3GS, 4, 4S (6<>24 Hours) [Tool ID: 402]
– AT&T USA – iPhone 2G, 3G, 3GS, 4, 4S (Express/Instant) [Tool ID: 401]
Both services are very stable. But when using “Express/Instant” please note that service open usually from 9am to 11pm (New York Timezone). Confirmation of Unlock arrive almost instantly (less than 5 minutes) when server is ON. But you may experience on rare occasion some delay if the server is overloaded (when one customer submit one big list of 100+ IMEI). When this happen, situation usually get back to normal after 1 hour.