HT1212 I have been trying to unlock my daughters phone and it is not working?

can not unclock iphone 4s

d.clement1 wrote:
it comes with a 1510 error code
Are you sure its 1510 and not 1015?
If it's 1015 this error is typically caused by attempts to downgrade the iPhone, iPad, or iPod touch's software. This can occur when you attempt to restore using an older .ipsw file. Downgrading to a previous version is not supported. To resolve this issue, attempt to restore with the latest iPhone, iPad, or iPod touch software available from Apple. This error can also occur when an unauthorized modification of the iOS has occurred and you are now trying to restore to an authorized, default state.

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