Mobile Dialer is a software application installed and used on mobile phones. Various software solution providers offer branded mobile dialers. They are used to make VoIP (Voice over Internet Protocol) calls from a mobile hand set. The "Mobile Dialer" or "Mobile VoIP Dialer" uses SIP signaling and can be mapped to a Softswitch or an IP device to work a device for voice communication. Newer mobile dialers also allow users to originate a Voice Call or SMS using their mobile handset.