SMS - What's the encoding?

Posted on 2006-03-21
Last Modified: 2008-02-26
What is the standard encoding for an SMS message sent through a mobile phone?

How do I check for the encoding given that I have access to the received SMS data?
Question by:jtjli
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    Assisted Solution

    LVL 27

    Accepted Solution

    The default encoding in an SMS message is a 7-bit character set called GSM 7, see In fact the SMS message itself can use other character sets, for example Unicode which is used in Japan and China, as well as ANSI and OEM Ascii.

    SMS are transmitted in packets called PDUs, each PDU containing a header before the *packed* 7-bit message. The format is slighly different depending on whether the PDU is to be sent or has been received. Take a look at :-

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