Cellphone does not support GSM7?

["João M. S. Silva"]

Hi,

I'm using mmcli successfully to send an SMS through a Huawei E1750.

I need the SMS to have several lines, so I cannot write the text in the 
command line, like:

   mmcli -m ${modem} \
	--messaging-create-sms="text='${text}',number='${number}'

in which $text has '\n' for newlines.

So, I'm using the alternative:

   mmcli -m ${modem} \
	--messaging-create-sms="number='${number}'" \
	--messaging-create-sms-with-data=/tmp/sms.txt

where sms.txt has the SMS correctly formatted (ASCII text with correct 
spacing).

The message seems to be correctly created and sent, since I can receive 
the SMS in a smartphone. However, in a non-smartphone the received SMS 
says "Not supported!". I guess this is because the message is sent with 
the GSM7 alphabet instead of ASCII?

Can you help or point me to some references (forum or IRC channel)?

Thanks.

-- 
João M. S. Silva