我也收到回信了,結果也是殘念 The unlock code for this device is unavailable due to security restrictions based on the device's history. You may want to return the device and/or provide feedback to the seller. AT&T will unlock an iPhone under the following circumstances: 1- The person requesting the unlock is a current AT&T customer or a former AT&T customer who can provide the phone number or account number for the account. The iPhone was designed for use on AT&T?s network. 2- All contract obligations, including any term commitment, associated with the device to be unlocked have been fully satisfied. 3- The iPhone has not been reported lost or stolen. 4- Current customer accounts must be in good standing with no past-due amount or unpaid balance and has been active for at least sixty (60) days. If you are able to provide a fax or email scan of your full retail purchase receipt you can reply to this email and we will file an unlock case for you. ?Our Device Unlock Department will require the proof of purchase to consider your unlock request.