| 摘要 |
A method and system for identifying a reply message using a relatively limited number of message source identifiers. In an exemplary embodiment, a message is sent with a source device to one or more target mobile devices on one or more wireless carriers. A gateway assigns one of a limited number of long codes to the message for each wireless carrier. Each long code identifies the gateway as a return address for the message. The gateway also stores the message in a virtual inbox for each target mobile device. When a target mobile device sends a second message to the long code, the gateway examines the associated inbox for a message assigned the same long code. If the gateway finds a matching message, the gateway interprets the second message received from the target mobile device as a reply to the first message.
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