Digital transmission on cellular devices ?

Externet

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Hello.
Is there a device like a 'smart phone' that can transmit data bursts on a telephony network to be stored at a server or two (for redundant safe-keeping) ?

A stream of data to be inputted to a cellular mobile device that will end kept at a remote server. Or, how is it done ? Just imagine a video conversation on a telephone link. It transmits in real time from one end to another or both simultaneously. Can that event be saved on the 'cloud' or at a designated place for later evaluation ?

Is there cellular telephones with "data input" jack ? Can their USB jack be used that way, not just for charging battery ? How is it done ?
 

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