A technology that gives GSM the capacity to handle services for the third generation of mobile telephony. EDGE provides three times the data capacity of GPRS. Using EDGE, operators can handle three times more subscribers than GPRS; triple their data rate per subscriber, or add extra capacity to their voice communications. EDGE uses the same TDMA (Time Division Multiple Access) frame structure, logic channel and 200kHz carrier bandwidth as today's GSM networks, which allows existing cell plans to remain intact.

SMS spoofing is the terminology of mobile phone networks which  uses the short message service (SMS) available on most mobile phones to  change the name or number of text messages appear to come from by replacing the originating mobile number .

 Down Side of SMS spoofing:

1)  Incorrect billing for the geniun subscriber.

2)Loss of revenues to the operator.

3)Illegal use of the network, degradation of the mobile network, the SMS service and the denial of other mobile services.

How can prevent SMS spoofing:

1)Prevent the delivery of messages from senders who use false identification.

2)Ensure that messages sent with a fake MSC number and/or a fake IMSI number are rejected and are not delivered.

3)Implement anti fack service.

VOIP stands for Voice Over Internet Protocol. In general we can say that voice travel over internet is called VOIP.

VOIP works by sending and receiving signals. These signals are the high and low electrical/optical pulse represented by 1s and 0s,basically VOIP converts voice communication into data packets.