[{'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: Information Related to Your Mobile Device: We may collect and store information related to your mobile device. In some cases, we, or Yahoo (who we use for mobile analytics and other services), may receive, generate, or assign your mobile device a unique identifier for the purposes described above in "Information Related to Use of the Services." We may also ask you to provide your phone number to enable new products and improve the Services, such as by enabling multi-factor authentication for Account login. We will always ask you whether it\'s OK for us to collect and store your phone number.'}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_Phone_Number_1stParty, Identifier_Device_ID_1stParty, Identifier_Device_ID_3rdParty.'}]