can someone explain this ?

i checked (paid) my iphone information with IMEI and they send me this message : MEID: Activation Policy Description: US AT& T Reseller . IMEI: 012657002432022 Applied Activation Policy ID: 10 Part Description: IPHONE 4 16GB BLACK Applied Activation Policy Description: Unlock. Product Version: 7.0.6 Next Tether Policy ID: 10 Last Restore Date: Next Tether Activation Policy Description: Unlock. Bluetooth MAC Address: First Unbrick Date: 03/11/11 MAC Address: 9803D8CF210A Last Unbrick Date: 12/14/12 ICCID: 89995016082236059007 Unbricked: true Unlocked: true 12/14/12 <<<< can someone explain this ?