Sony Ericsson manual SIM application toolkit, SIM AT services supported by the T290i/T290c

White Paper T290i/T290c

SIM application toolkit

The SIM Application Toolkit (SIM AT) is a smart card-centric method of deploying programs that apply only to GSM and to SMS and USSD trans- ports. Programs must be distributed on smart cards. WAP is an Internet-centric method of deploying programs that is independent of network technology. Programs and content are kept cen- trally on web servers and downloaded as required. While there is some overlap, WAP is a particularly good choice when deploying programs that also have an HTML version for desktop use. Work is currently under way on building interfaces between the two technologies.

For an operator, a company or service provider, SIM AT offers a powerful way to deploy programs and services to users, without the need for new or upgraded equipment. All necessary setup and pro- gramming is distributed to users over the air, directly to their phones. In the T290i/T290c, a sep- arate menu is available for functions residing on the SIM card. These can include submenus for control- ling functions, and also functions which allow the phone to initiate calls, send data, and display infor- mation to the user.

SIM AT services supported by the T290i/T290c

Service	Mode	Support
		in T290i/
		T290c
CALL CONTROL		Yes
CELL BROADCAST DOWN-		Yes
LOAD
DISPLAY TEXT	Text of up to 240 characters (120 ucs2 coded).	Yes
	bit 1: 0 = normal priority	Yes
	1 = high priority	Yes
	bit 8: 0 = clear message after a delay	Yes
	1 = wait for user to clear message	Yes

33 October 2004