Many mobile service providers offer the ability to receive SMS messages via an SMS Gateway. This means by sending an email to a special email address provided by your phone service company, you will receive the email as an SMS message.
Of course, this is ideal for NEMS Linux notifications.
Rather than maintain a massive list here (reinventing the wheel), please see mfitzp's List of SMS Gateways CSV file.
Simply set your contact email address in NEMS NConf to the appropriate SMS Gateway address.