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The Short Message Service, as defined within the GSM
digital mobile phone standard, has several unique features: With
SMS the mobile phone user is able to create short
messages via mobile phones. A single short message can be up to 160 characters
in case of Latin characters and 70 characters in case of Arabic characters. The
SMS is a store and forward service, short messages
are not sent directly from sender to recipient. Short messages are always sent
via an SMS Center, supported by mobile operators.
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