Ericsson T18s User's Guide Page 95

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Not for Com
mercial
Use
E
r
i
cs
s
on M
obile Com
m
unicat
i
ons
A
B
94 Glossary
PIN2
Personal Identification Number 2 – an authorization code which is used only
for special services.
PUK
Personal Unblocking Key – used to unlock a blocked SIM card. This comes
with your subscription.
Roaming
Within your home network, this means that your mobile phone automatically
sets up communication procedures with different radio base stations when on
the move.
Semi-Duplex
In handsfree equipment, full duplex means that the connection is open for
both parties to talk simultaneously. Semi-duplex gives close to, but not com-
plete, duplex functionality.
Service Provider
a company that provides services and subscriptions to mobile phone users.
Short Message Service
(or SMS) allows messages of up to 160 characters to be sent and received via
the network operator's message centre to your mobile phone. Messages are
stored if the phone is off or out of reach ensuring that they reach you. To use
this service, it must be supported by your network.
Scroll
pressing the left or right arrow key to move between the menus.
Select
scrolling to a menu then pressing the
YES key on the phone.
SIM card
Subscriber Identity Module card – a card that must be inserted in any GSM-
based mobile phone. It contains subscriber details, security information and
memory for a personal directory of numbers. The card can be a small plug-in
type or credit card sized but both types have the same functionality.
SMS
see “Short Message Service” on page 94.
Subscription
is the contract that you have with the service/network provider. To use your
phone, you need to have a subscription to a network. You get a SIM (Sub-
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