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SSID Service set identifier. SSID is the name that identifies the
specific WLAN.
Streaming Streaming audio and video files means playing them directly
from the web without downloading them first to your
device.
UMTS Universal Mobile Telecommunications System. UMTS is a 3G
mobile communication system. Besides voice and data,
UMTS enables audio and video delivery to wireless devices.
When you use your device in GSM and UMTS networks,
multiple data connections can be active at the same time,
and access points can share a data connection. In the UMTS
network, data connections remain active during voice calls.
You can, for example, browse the web faster than previously
possible while simultaneously speaking on the phone.
UPIN PIN code used in UMTS network.
UPUK UPIN Unblocking Key. UPUK code is required to change a
blocked UPIN code or PIN2 code. The length of the code is 8
digits.
USIM SIM card used in UMTS network.
USSD command A service request, such as request to activate an application
or configure various settings remotely, that you can send to
your operator or service provider with your device.
VPN Virtual private network. VPN creates a secure connection to
compatible corporate intranet and services, such as e-mail.
WAP Wireless application protocol. WAP is an international
standard for wireless communication.
202 Glossary