A wireless communication accessory for a mobile communication device comprising: a casing that conforms, at least partially, to the outer shape of the mobile communication device; a processing circuit housed within the casing and configured to process a first data; and a wireless transmitter coupled to the processing circuit, where the transmitter is configured to transmit the first data. The wireless communication accessory may further comprise a wireless receiver that is configured to receive a second data from an external wireless device. The first data may be associated with any or all of the following: payment card information for processing purchase transactions; public transportation account information for processing travel credits on public transportation systems; and access card information for gaining access into restricted areas.