Unlock iPhone

Hi, how unlock this iPhone
IMEI:3544070670XXXXX
Serial Number: F17NHXHXG5XX
Part Description: IPHONE 6 MM 16GB GRAY
Product Version: 9.2
Initial Activation Policy ID: 2050
Initial Activation Policy Description: US GCI Policy
Applied Activation Policy ID: 2050
Applied Activation Policy Description: US GCI Policy
Next Tether Policy ID: 2050
Next Tether Activation Policy Description: US GCI Policy
First Unbrick Date: 15-4-14
Unbricked: false
Unlocked:false
thanks in advance