BitLevelSMS Demo - Version 1.0 This program is a Demo application for BitLevelSMS software library which provides a PC-based user application with access to a mobile phone's Short Message Service (SMS) functionality over serial port, according to ETSI standards: GSM 07.05 (ETS 300 585) and GSM 03.40. BitLevelSMS Demo allows the user to: send and receive SMS messages on many GSM mobile phones, including Siemens C35, S25, ME45, Nokia 6610 and others.