Sony Ericsson T20e Benutzerhandbuch

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The SIM Application Toolkit (SIM AT) is a smartcard-centric method of deploying programs 
that apply only to GSM and to SMS and USSD transports. Programs must be distributed on 
smartcards. WAP is an Internet-centric method of deploying programs that is independent of 
network technology. Programs and content are kept centrally on web servers and downloaded as 
required. While there is some overlap, WAP is a particularly good choice when deploying pro-
grams that also have an HTML version for desktop use. Work is currently underway on building 
interfaces between the two technologies.
For an operator, a company or service provider, SIM AT offers a powerful way to deploy pro-
grams and services to users, without the need for new or upgraded equipment. All necessary 
setup and programming is distributed to the users over the air, directly to their phones. In the 
T20e, a separate menu is available for functions residing on the SIM card. These can include 
submenus for controlling functions, and also functions which allow the phone to initiate calls, 
send data, and display information for the user.
  
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Service 
Mode
Support
in T20e
 
CELL BROADCAST 
DOWNLOAD
Yes
DISPLAY TEXT
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
GET INKEY
General: The GET_INKEY requires that the 
user press “Yes” to confirm his/her choice
Yes
bit 1:
0 = digits (0-9, *, # and +) only
1 = alphabet set
Yes
Yes
bit 2:
0 = SMS default alphabet
1 = UCS2 alphabet
Yes
Yes
bit 3:
0 = character sets defined by bit 1 
and bit 2 are enabled.
1 = character sets defined by bit 1 
and
bit 2 are disabled and the “Yes/No”
response is requested.
No
No