http://www.bashkortostan.mts.ru/mymts/sms/sending/form.php
http://www.bashkortostan.mts.ru/mymts/sms/sending/form.php?num=******* where *******
are last 7 symbols of telefone number. (max 134 characters)
Also we can use e-mail service. Sending message on sms@bmtelecom.ru we put *******
in a line "subject".