It's true that Beijing BMW 4s shop wants mobile phone number, name and signature. In order to protect consumers' interests and provide better service, automobile 4S stores will ask customers to provide detailed personal information and sign for confirmation. This information may include name, contact information, ID number, address, vehicle information, etc. The purpose of providing this information is to verify the identity of customers, so as to ensure the authenticity and accuracy of customer information. When buying, repairing or maintaining a car, it is usually necessary for customers to sign relevant agreements or confirmation sheets to clarify the responsibilities and rights of both parties because of matters involving a large amount of money or high security. These agreements and confirmations usually require the customer's personal information and confirmation signature.