SIP-enabled devices in 19% of phones by 2012, study says

A new study from Informa Telecoms & Media predicts there will be 435 million Session Initiation Protocol-enabled mobile phone users by 2012.
The research firm said SIP-enabled mobile phones will number about 275 million this year. It expects the market to show strong growth between 2010 and 2011 and ultimately be included in 19% of devices by 2012.
Informa said handset giant Nokia Corp. has the largest SIP-enabled product portfolio of all major handset vendors with 35 SIP-capable devices currently available. The firm also noted that currently SIP is likely to be activated in only about one-third of SIPcapable devices sold.
SIP is a signaling protocol used for establishing Internet Protocol sessions.