Embodiments described herein disclose a mobile device system for displaying contactless payment options to a user of a mobile device. A location of the device may be detected. The location may be transmitted to a payment services provider, and information indicating that the location corresponds to a merchant having contactless payment options may be received. In response, graphical depictions of payment options associated with a plurality of payment sources are displayed on a touch-sensitive display of the mobile device. A selection of one of the graphical depictions is received, and in response, one or more transceivers of the mobile device, such as one or more NFC transceivers, may be activated. The activation may cause the transceivers to transmit a personal account number to a point-of-sale terminal. Thus, the user is presented with contactless payment options based on a geographical location, and may be presented with a suggested payment source.

An electronic device may include a transmission circuit and an inductive element. The inductive element may be configured to generate a wireless communication signal based on a current. The transmission circuit may be configured to output the current based on a supply voltage; to increase an intensity of the current, from zero to an increased intensity that is less than or equal to a target value, by alternately repeating a first increase and a first decrease of the intensity of the current, in a first time interval; to decrease the intensity of the current, from the increased intensity to zero, by alternately repeating a second increase and a second decrease of the intensity of the current, in a second time interval.

Various embodiments provide a handheld electronic device capable of magnetic field communication. The handheld electronic device includes: a first cover, a second cover, a memory, a display, a processor, first and second antennas, and at least one sensor. The memory stores instructions that enable the processor to: store payment information in the memory; display at least one image or text related to the payment information on the display, in response to at least part of a user input; determine whether a payment process starts by using the electronic device; and transmit, according to the determination as to whether a payment process starts, a first signal related to the payment information via the first antenna, and allow an external device to read the payment information via the second antenna.

An embodiment includes a multi-function electronic device capable of generating a programmed magnetic field of alternating polarity based on a speed of a card swipe, and methods for constructing the device for the purpose of emulating a standard credit card. An apparatus is described to allow the device to emulate behavior of a credit card when used in electronic credit card readers. Additionally, methods are described to allow user control of the device for the purpose of authorizing or controlling use of the device in the application of credit, debit and cash transactions, including cryptocurrency and device-to-device transactions. Methods are also described for generating a limited-duration payment number when performing a transaction for the purpose of creating a limited-use payment number, which is limited in scope of use to a predetermined number of authorized transactions. Furthermore the device may interact with other similar devices in proximity for the purpose of funds or credit/debit transfers.

A magnetic secure transmission system includes an inductor, a switching circuit connected to the inductor, and a control circuit. The control circuit controls the switching circuit to adjust a level of a current in the inductor by a first amount over a data transmission period, such that the inductor emits a magnetic pulse including a first magnitude during the data transmission period. The control circuit controls the switching circuit to adjust the level of the current in the inductor such that the level of the current is increased and decreased repeatedly by a second amount between two different levels during a data non-transmission period, and the inductor emits a magnetic pulse including a second magnitude during the data non-transmission period. The second amount is less than the first amount, the first magnitude is greater than a threshold value and the second magnitude is less than the threshold value.

An electronic transaction card communicates with an add-on slot of an intelligent electronic device. The add-on slot may be a memory card slot. The intelligent electronic device may be a mobile phone or other device with or without network connectivity. The electronic transaction card may have magnetic field producing circuitry compatible with magnetic card readers, smartcard circuitry, other point-of-sale interfaces, or any combination thereof.

An embodiment includes a multi-function electronic device capable of generating a programmed magnetic field of alternating polarity based on a speed of a card swipe, and methods for constructing the device for the purpose of emulating a standard credit card. An apparatus is described to allow the device to emulate behavior of a credit card when used in electronic credit card readers. Additionally, methods are described to allow user control of the device for the purpose of authorizing or controlling use of the device in the application of credit, debit and cash transactions, including cryptocurrency and device-to-device transactions. Methods are also described for generating a limited-duration payment number when performing a transaction for the purpose of creating a limited-use payment number, which is limited in scope of use to a predetermined number of authorized transactions. Furthermore the device may interact with other similar devices in proximity for the purpose of funds or credit/debit transfers.

Systems and methods for associating a proxy card with an electronic wallet are disclosed. A computer implemented method may include receiving anauthentication information of a proxy card, and associating the proxy card with an electronic wallet, wherein associating the proxy card with the electronic wallet allows secure access to the electronic wallet when the proxy card is presented at a point of sale. A system may include a proxy card comprising authentication information, and an electronic wallet associated with the proxy card, wherein the association of the electronic wallet with the proxy card allows secure access to the electronic wallet when the proxy card is presented at a point of sale. A wallet redemption card may comprise a rewriteable magnetic stripe, a smart chip, a wireless communicator operably connected to the smart chip, and an interface operably connected between the rewriteable magnetic stripe and the smart chip.

A method implemented on an augmented reality (AR) electronic device includes receiving a request to activate a transaction card account on a transaction card. The transaction card account is activated on the transaction card. A virtual representation of account information corresponding to the transaction card account is displayed on the AR electronic device. The exterior of the transaction card is free of account identifying information.

Embodiments described herein disclose a mobile device system for displaying contactless payment options to a user of a mobile device. A location of the device may be detected. The location may be transmitted to a payment services provider, and information indicating that the location corresponds to a merchant having contactless payment options may be received. In response, graphical depictions of payment options associated with a plurality of payment sources are displayed on a touch-sensitive display of the mobile device. A selection of one of the graphical depictions is received, and in response, one or more transceivers of the mobile device, such as one or more NFC transceivers, may be activated. The activation may cause the transceivers to transmit a personal account number to a point-of-sale terminal. Thus, the user is presented with contactless payment options based on a geographical location, and may be presented with a suggested payment source.