Computer based method and system for logging in a user mobile device at a server computer system

A computer-readable storage medium having stored thereon a set of instructions which, when executed by a processor of a computer carries out a method comprising:

• registering a unique identifier of a user mobile device;
• receiving a message from the user mobile device;
• detecting an Internet Protocol address associated with the user mobile device;
• receiving the unique identifier corresponding to the Internet Protocol address;
• and
• transmitting to the user mobile device a file customized for the unique identifier.

A computer system comprising:

• a server computer system including a memory and processor connected to the memory;
• a database stored in the memory, the database including a plurality of registered users;
• a computer program stored in the memory and executable by the processor, the program including:
• a first interface that is from the server computer system, the first interface having field for entering registration information;
• a detecting module for detecting an Internet Protocol address of a user mobile device;
• a receiving module for receiving a unique identifier of the user mobile device corresponding to the Internet Protocol address;
• a first matching module for matching the unique identifier with registered user data;
• and
• a second interface that is transmitted to a user mobile device, the second interface displaying a user-specific homepage.