Re: GSM and Unicode

Tue, 04 Nov 2003 15:33:59 -0800

In a message dated 11/4/2003 1:43:18 PM Pacific Standard Time, [EMAIL PROTECTED] writes:
That's normal: the GSM standard is not intended to support Unicode.
Unicode support is added by phone makers that create products
which can interact with 2 encoding schemes, provided that the
GSM phone service provider offers this interchange in its platforms.
hum.... I am quite lost. the GSM standard always support BOTH the default alphabet (which is a 7 bits) and a 16 Unicode mode. The problem is the Unicode mode can only send 70 characters and the default alphabet mode can send 140 characters


For example Nokia has a built-in "auto mode" in its phones which can
detect automatically whever the incoming SMS message is coded in Unicode
with UTF-8 or with the GSM charset with the prefixed ITU encoding
scheme. It works reliably, but Nokia has also offered a compatiblity
protocol option in the GSM standard, that allows sending explicitly which
charset is actually used.
are you sure it is 'UTF-8" instead of 16 bits Unicode ? (UCS2 or UTF-16)?
I have not be able to find any material about Nokia support UTF-8, however, I do find material that Noaki support 16 bits unicode
 


Users can then (like in browsers) choose a default charset when the
encoding is not explicitly sent in the SMS message, but generally,
SMS operators prefer transmitting the Unicode specifier explicitly when
this is needed, so that phones will be able to determine correctly the
effective charset used. I have no details on how this works, but I think
that UTF-8 is marked simply by sending a leading BOM in the SMS
message.
Leading BOM encoded as 3 bytes in UTF-8 ??? Are you sure they are sending UTF-8 instead of 16 bits Unicode?


Look in your mobile phone, in the configuration menu for SMS messages.
If it is not present, then the default setup is based on the default setting
for the country of the phone network on which your phone is connected.
 
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