A detachable storage device is disclosed in the invention. Four antennas of a user equipment can be grouped by a 2-antenna unit. The widget authenticates the customer as a financial institution account owner, and the financial institution server displays to the customer his or her available payment accounts and receives customer input regarding the desired payment account. A set of unique pilot sequences has been pre-defined, and the base station assigns specific pilot sequences from the set of pilot sequences to specific common pilot channels, forming a pilot sequence assignment pattern representing a specific control information.