User`s guide

Dolphin® 7900 User’s Guide Rev F
10/16/07
10 - 11
USSD
Short for Unstructured Supplementary Service Data, (USSD) is a technology unique to GSM that enables session-based text-
messaging as opposed to SMS, which is store-and-send text-messaging. Turnaround response times for interactive applications
are generally shorter for USSD than SMS. USSD is not currently available on all carrier networks.
USSD communicates with a USSD application portal, a news portal or a chat session with a co-worker.
Tap Tools > USSD.
Send Sends the text entered in the Message section and begins the USSD session.
End Ends the USSD session.
Message Enter text to a USSD portal.
Network message Displays the USSD message received from the network, allowing a session-based interaction.
Call Log
The Call Log maintains a list of the last 20 calls made or received in each of the following categories:
• Voice Calls In (Default)
•Voice Calls Out
• Voice Calls Missed
•GPRS Data
You can access the Call Log two ways:
1. Tap Start > Programs > uPhone > Call Log OR
2. Open the Dialler and tap Tools > Call Log.
The Call Log opens displaying the last few Voice Calls In; the most recent call always appears at the top.
Set maximum available
Display a window for the subscriber to enter a PIN number–“PIN2”–from the subscriber.
When the correct PIN is entered, the maximum available charge units for the user is set on
the SIM card.
Field Description