Sim Application Toolkit; Sim-At Services Supported By The P900 - Sony Ericsson P900 White Paper

SIM Application Toolkit

SIM Application Toolkit
SIM Application Toolkit (SIM-AT) is a method of developing small applications for mobile phones. User
interaction is via the screen and keyboard, whilst connectivity is provided by means of SMS and USSD
transports. SIM-AT can also be used to initiate phone calls. A typical application is to provide a simple menu-
based interface to value-added services provided by the mobile operator. The application is stored and
distributed on the SIM card. SIM-AT offers a powerful way to deploy programs and services to users, without
the need for new or upgraded equipment. All necessary set-up and programming is distributed to users over
the air, directly to their phones.
The P900 supports SIM-AT according to GSM 11.14 in order to protect investment in SIM-AT based
applications and to enable users to continue using the services and applications on their SIM cards. The
applications are accessed from within the UI of the P900's Phone application.
The P900 also has much richer application environments including WAP, Web, C++ and Java. These enable
applications to be created with a much better UI and superior connectivity such as TCP/IP over the Internet.

SIM-AT Services supported by the P900

Service
CALL CONTROL
DISPLAY TEXT
EVENT DOWNLOAD
GET INKEY
GET INPUT
LAUNCH BROWSER
MORE TIME
Description
This will enable the SIM to allow, bar or modify a call (supplementary service
operation or USSD operation).
Text is displayed on the screen according to the request from the SIM
application:
Priority:
Clear Message:
Alphabet:
The Event Download enables the ME to report on events to the SIM:
•
Location Status
•
Idle Screen Available
•
Language Selection
•
Call Connected
•
Call Disconnected
•
Browser Termination
Request the user to enter a single character.
•
0-9 *# + only or alphabet set
•
Yes/No Response
•
SMS default or UCS2 character set
Request the user to enter a number of characters.
•
0-9 *# + only or alphabet set
•
SMS default or UCS2 character set
•
Input echoed or secret
•
Packed or unpacked.
The P900 will launch the integrated browser.
More Time allows the SIM Toolkit more time for processing its task, if the
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P900/P908 White Paper, December 2003
Normal, High
Automatic after delay, Wait for user.
UCS2, packed and unpacked SMS default
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