Here are the advantages and disadvantages of CDMA:

The Advantages of CDMA:

• Enable integration of voice, data and video. Spread-spectrum and power-control functions that increase the capacity of CDMA call bandwidth is sufficient for a variety of multimedia data services, and the soft hand-off scheme ensures no data loss.

• Number of subscribers in a cell may access the frequency spectrum bands together for a particular encoding technique. Considered more advanced than CDMA digital cellular system that already exists. FSN is able to provide a more natural sound than the perfect digital cellular systems that already exist.

• Have very low power output that is 0.2 watts (compared to the GSM system) that use 1.5 to 3 watts, making batteries CDMA system more durable. Requires lower transmit power, so cell phone talk time may be longer.

Here are the advantages of CDMA:

• Meet the needs of voice and data communications wirelessly

• Has a higher channel capacity to know more simultaneous calls per channel compared to other systems.

• CDMA system offers the capacity improvement exceeds the analog AMPS system as good as other digital cellular technologies. CDMA generates a spread-spectrum scheme that randomly provides the available bandwidth of 1250 KHz for each bit rate of 9600 bps caller.

• Improved call security. Security to the nature of CDMA spread spectrum approach, and the fact that this technology was first built to provide secure communications for the military.

Virus is growing very rapidly. Not only attack computers but has expanded into the mobile phone either for mobile SYMBIAN, java and a PDA pocket. Secure the phone that does not have a basic OS (Operating System), for example, although the cell phone to send MMS but cannot have a cell phone SYMBIAN OS or Java so it was safe.

If a mobile phone virus, of course, can cause damage on a cellular phone system is that sometimes a short message / MMS does not show the text, the phone's performance decrease, some applications in the phone mysteriously disappeared and many more.

There are several media that can be used as a means of distributing viruses on mobile phones, among which are Bluetooth, Infrared, Wi-Fi, Cable Data, and Internet. Various ways can be done to prevent the virus infecting mobile phones, such as installing anti-virus on your phone, turn off.