[{'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: About our services Registration. You must register for our Services using accurate data, provide your current mobile phone number, and, if you change it, update this mobile phone number using our in-app change number feature. You agree to receive text messages and phone calls (from us or our third-party providers) with codes to register for our Services."}, {'role': 'assistant', 'content': 'This clause is unfair. The privacy practices mentioned are: Contact_Phone_Number_1stParty.'}]