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Received second-hand iPhone just do not understand anything

Users questions:Hello, everybody had the dish machine with the Saipan to the secondary market today collected a 3GS 16G of the iPhone? Apple never touched the dish. To know to unlock the lock to escape does not escape how to look under the origin of it? There is no jailbreak unlock how to see no? Thank you!
Experts answer:4.01 no longer escape the more the relationship is not much
  • This information provided by the users.Thanks!