You can send free of charge short messages to CERN GSMs by sending email to the following address:
firstname.lastname@example.org (xxxx is last 4 digits of the GSM)
SMS messages are limited to 160 characters, which are a concatenation of the following email fields separated by space: Sender_address + Email_subject + Email_body.
Access to this service is restricted to CERN mail users.
See http://cern.ch/sms for additional information on SMS at CERN.