At the Mobile World Congress on Monday Gemalto announced a SIM card-based application that allows any GSM-based mobile phone to interact with Facebook using SMS messages, without the need for a data connection. It was built for wide compatibility on simple GSM handsets, according to Gemalto, using two basic technologies. It uses Class 2 SMS messages, a type of message which is stored and used on the SIM card, not the phone, and it also uses the GSM SIM Toolkit, which is part of the GSM standard and available on all GSM handsets..
