Nokia 610 User Manual page 74

Glossary
SIM card
The SIM (Subscriber Identity Module) card contains all the
information the cellular network needs to identify the network
user. The SIM card also contains security-related data.
SMS
The network service SMS (Short Message Service) allows you to
send short text messages (of up to 160 characters) to mobile
phones and to receive short text messages from other mobile
users if this service is enabled.
SMSC number
The SMSC (Short Message Service Centre) number is needed for
sending of short messages.
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