Ericsson A1018 Manual page 82

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 (Subscriber 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 accessible to you. If you want a
complete list of the services included in your subscription, please
contact your network operator.
82 Glossary