On Web sites that offered this service, said that as a result of the iPhone was locked out so-called "neverlock" (by adding the IMEI-number in the database of U.S. service provider).
Various online services argued that the procedure should be completed within 5-20 days, and organized a pre-order at a price starting from $ 35.
But today, most of these services (cutyoursim.com, etc.) stopped accepting orders and have already begun to return money spent by consumers.
It was expected that the service will be the first working solution for 4.11.08 baseband, which is still no hardware or software options for unlocking. Note that during the existence of "factory" unlock we have not received successful feedback from the iPhone 4 with 4.11.08 baseband users.
For those who are waiting for unlock iPhone 4 with baseband 04.11.08, we recall that the Applenberry team now work on Gevey Sim 2 hardware solution.