Originally Posted by mokmap
I have a Nokia lumia 1520 block SFR (french operator) I'd like to know is it possible to unlock?
My 1520 Lumia is jailbroken because I have a developer account.
Your phone is not
jailbroken because of a developer account. There currently is no possibility to jailbreak any Windows Phone, at least it hasn't been published so far. The closest developers have come to a jailbreak a Windows Phone 8 device is by interop unlocking the Samsung ATIV S.