CUG (Closed User Group)
This network service allows the restriction of calls to and from a selected user group.
DTMF (Dial Tone Multi Frequency)
Codes sent as tone signals. Used for telephone banking, for accessing an answering machine,
etc.
GPRS (General Packet Radio Service)
New packet service that allows information to be sent and received across a mobile network. T
he GPRS promises data rates from 56 up to 114 Kbps and continuous packet connection to the
Internet for mobile phone and computer users. It is based on existing GSM such as circuit-swit
ched cellular phone connections and complements that.
Network Service Operator
To be able to use your phone, you need a subscription to a network. You get this subscription f
rom a network operator, together with a SIM card that you need to use with your phone.
PIN (Personal Identification Number)
The code is to establish authorization for access to certain functions or information in your SIM
card. The PIN code comes with your subscription. It may be a four to eight digit number and c
an be changed as required.
PIN2 (Personal Identification Number 2)
The code is an authorization code to access certain special field in your SIM card. The PIN2 co
de does not come with your subscription in some country.
