A mobile wireless communications device may include a satellite position determining device, and a near-field communication (NFC) device being switchable between a first NFC mode and a second NFC mode, wherein the second NFC mode provides a lower power consumption by the NFC device compared to the first NFC mode. A controller may also be coupled with the satellite position determining device and the NFC device. The controller may be configured to switch the NFC device from the first NFC mode to the second NFC mode based upon a determination of movement of the mobile wireless communications device at the rate faster than a threshold rate.