Patent ID: 8915447

Claim:
A transaction card, comprising: a first interface that connects to a microSD slot of a mobile host device; a second interface that includes an internal antenna for wirelessly communicating with retail terminals; secure memory that stores user credentials and a payment application used to execute financial transactions with the retail terminals, the user credentials and the payment application associated with a financial institution; a user-interface module that presents and receives information through a Graphical User Interface (GUI) of the mobile host device; a transaction processing module that executes the payment application using the user credentials in response to at least a transaction request received by the RF module and transmits at least one transaction response to the retail terminal based, at least in part, on the executed payment application; and an amplification module configured to amplify at least received RF signals, the amplification module operates independent of the transaction processing module and includes only passive components a ninth and tenth pin configured to connect with an external antenna in the mobile host device; and a multiplexer configured to switch between the card using the internal antenna and the external antenna.