There are no known viruses using the SMS (Short Message System) under GSM
cellular phones. However, several techniques of crashing a phone by sending
a malformed SMS text message to it have been found over the years.
None of the known methods of crashing a phone like this this work universally:
they typically only affect a single GSM handset software version from one GSM
vendor. As there are hundreds of different GSM handsets from several vendors
with the built-in software frequently updated, it would be impossible to come
up with a technique that could affect more than just a handful of existing
Thus, a risk of generic 'SMS Killer' is minimal.
Known techniques of crashing GSM handsets via SMS messages include sending
a message with 160 '.' or '-' characters in a row to a recipient with an
old-style GSM handset, or by sending SMS messages with a malformed
User Data Header, as outlined by ITSX researcher Job de Haas.