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Glossary 111
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 functions.
SMS
see Short Message Service above.
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-
scriber Identity Module) card with your subscription. The services included in
your subscription depend on your choice of operator and/or subscription. So
some of the services and functions described in this manual may not be acces-
sible to you. If you want a complete list of the services included in your sub-
scription, please contact your network operator.
Two Line Service
(also called Alternate Line Service, ALS) enables you to have two lines and
two different phone numbers on one subscription for your mobile phone. This
makes it possible to have separate numbers for business and personal calls. To
use this service, it must be supported by your network.