Patent ID: 8494579

Claim:
A method performed by a server device for enabling a first mobile device to send a message to a data communication network on behalf of a second mobile device, the method comprising: determining that the first mobile device is back into coverage with respect to the data communication network, the first mobile device having received a hosted message from the second mobile device while the first and second mobile devices were out of coverage with respect to the data communication network; providing information to the first mobile device indicative of delivery of hosted messages using the data communication network to enable the first mobile device to use the information to determine if the hosted message to be sent by the first mobile device on behalf of the second mobile device has already been sent to the second mobile device, the information comprising a unique message identifier for each hosted message; enabling the first mobile device to send the hosted message to the data communication network if the hosted message has not already been sent; and updating the information as hosted messages are sent to the data communication network by the server device.