Abstract: A method and system is provided for making store sales at a location remote from a sales counter in the store. A mobile computer device is used as a point-of-sale device to scan a product bar code identifier, to display product information associated with the product identifier, to input a quantity of items to be purchased by a customer and to select a payment type for purchasing the items. The device can communicate wirelessly with a database of product, inventory, sales and customer information and can automatically select the type of wireless connection to use. The device includes a card reader to read information from a payment card and a PIN entry pad for entering a PIN when the payment card has a debit capability. The device includes a PIN pad test program to determine whether the PIN entry pad is defective.