JD。 COM's door-to-door mobile phone recycling process includes reservation, door-to-door inspection and evaluation. When making an appointment, the user needs to provide the basic information of the mobile phone, such as brand and model. However, the actual valuation was carried out during the on-site inspection. The staff in JD.COM will make a detailed inspection of the mobile phone, including the evaluation of appearance, function and performance, so as to determine the actual value of the mobile phone. So the valuation is based on the actual situation, which may be different from the user's estimate.