Techniques and systems are provided for facilitating secure pairing of a client device with a remote device using a inductive pickup coil in the client device and an intermediate hearing-aid-compatible (HAC) mobile device. Credentials stored in or accessible to the mobile device may be encoded in an magnetic HAC signal in the audio frequency spectrum and communicated to the client device through inductive coupling with the inductive pickup coil in the client device. The client device may then use the credentials to gain access to the remote device. In some implementations, the mobile device may cease broadcasting the magnetic signal upon receipt of an indication that the client device has gained access to the remote device.