Russian national operator Rostelecom has introduced to its retail customers an opportunity to get billing information over SMS.The option is available in the North-Western macro-regional branch of the operator. The service can be used by sending a SMS to a special premium number. The free service offers several options, such as information on the credit balance, the last payment or the activation of credit for services. The service is free for subscribers of all Russian mobile operators.
Source: Telecom Papers