3G is still in use but there is now a fourth generation (4G) technology that will have 10 or more times the data rate as the 3G network. A cellular network system is broken into small geographical areas called cells; these cells are connected to mobile telephone switching office (MTSO). The connection from the cell to the MTSO is done over a telephone line (fixed line) or with some applications microwave is used. A cellular network has cell towers placed throughout the geographical area and the towers pick up the radio frequency of the cell phone, when the signal strength gets low the signal is passed to the next tower. These towers are placed throughout the entire world in order for a cellular network to work. The entire cellular network is built of many cell phone companies working together to keep the network running. Security on a cellular network depends on the security of all components that it takes to connect to the network due to the data (signals) travel through the air and not over a line. To secure the data is to use encryption when transmitting the data; this will only allow an authorized device to be able to read the data. Troubleshooting a cellular network is the responsibility of the subscriber and the cell company. Depending on what caused the issue as to who is responsible. If it is hardware issue this is normally subscriber issues due to you own the equipment. If an issue