| 摘要 |
A communicating device may determine a lack of wireless network coverage. The communicating device may repeatedly send a message via a narrow-band communication medium. One or more other communicating devices may receive the message via the narrow-band communication medium. Later, when a communicating device that received the message has the wireless network coverage, the message may be transmitted to an originally intended recipient via the wireless network. The intended recipient may send a reply message to one or more communicating devices via the wireless network. When a communicating device that received the reply message no longer has the wireless network coverage, the communicating device may send the reply message via the narrow-band communication medium to one or more other communicating devices. The communicating device, that originally sent the message, may receive the reply message and may present information from the reply message to a user.
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