[{'role': 'user', 'content': "Analyze the following clause from a privacy policy and determine if it's fair or unfair. Also identify any privacy practices mentioned: d) Service-related communications from BlackBerry BlackBerry may also send you certain service-related communications. For example, BlackBerry may send a welcome email or message when you first register your device to inform you about the service and its terms, to notify you of important changes, to tell you how to manage your credentials or account, to provide service infrastructure notifications or information about upgrades or updates, to provide warranty information, product recall information, safety or security information, or for surveys of current or former users. Because such service-related communications are important to your use of BlackBerry Offerings, you may not opt-out of receiving these communications."}, {'role': 'assistant', 'content': 'This clause is fair. The privacy practices mentioned are: nan.'}]