At the behest of the GSM Association (GSMA),
fifteen network operators have founded a joint initiative against the
spread of spam via mobile communications networks and published a "Code
of Practice" (PDF file).
The initiative is focusing on spam sent as a text message or MMS,
which has been divided into three categories: first, advertising that
the cell phone user did not request; second, messages that directly or
indirectly lead to calls of expensive premium services; and third,
fraudulent content, such as the spoofs familiar to users of fixed
For more information, click here.