From Symbian Developer Community

Recipe
	Amount of time required: 1 minutes Required libraries: None Required header files: None PlatSec Capabilities: None Compatibility: S60 3rd, 5th and later Comes with Code: embedded

Symbian/S60's Web Runtime has a rich set of javascript extensions called Platform Services: contacts, calendar, location, logging, media, messaging, etc. Nice, but how does one make a call? I mean, it is a phone after all. Turns out there is the well known tel URI protocol[1]. The syntax is simply tel:<number>. This can be used directly in an href or in javascript.

var url = "tel:+18661231234";
widget.openURL(url);

Here +18661231234 represents a generic phone number.

There is also an sms protocol. The syntax allows you to define both the number and seed it with a message for the user.

//  The message consists of percent-encoded UTF-8 characters.
// see http://tools.ietf.org/html/draft-wilde-sms-uri-12
var url = "sms:+18661231234?body=The%20Sky%20is%20so%20beautiful.";
widget.openURL(url);

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