What is the difference between cellular data and cellular data network on iPhone4

Cellular data on iPhone4.

Differences with cellular data networks:

1.Cellular data, that is, from data transmission to switching, adopts packet technology, and the user is equipped with a wireless packet modem.

Entering the packet network through a dedicated packet base station can access the host and database on the packet network, and can also call another mobile data terminal. This technology is mainly used in specialized mobile data communication systems and can only provide mobile data users with a connection to a user of a packet-switched data network.

2.Cellular mobile communication is the use of cellular wireless networking, in the terminal and network equipment.

are connected via wireless channels, allowing users to communicate with each other during activities. Its main feature is the mobility of the terminal, and it has cross-zone handover and cross-local network roaming functions. Cellular mobile communication service refers to the voice, data, image and other services provided by the cellular mobile communication network composed of base station subsystem and mobile switching subsystem.

Cellular data is based on cellular networks.

On the basis of this, you can turn on the data and access the Internet.

Because small wireless communication equipment for mobility and other reasons, the power is relatively small, the communication distance is not very far, in order to achieve long-distance communication and efficient communication and communication management, a certain amount of base stations are required for data processing and **, the wireless coverage distance of the base station is also limited, it is necessary to cover the entire area of multiple base stations, and only the location of the base station is hexagonal layout, which is the most efficient, and multiple hexagonal rows are superimposed together to be very similar to cellular.

The parameters used for this layout are also known as cellular data.

Not only wireless communication base stations, but even some service industry outlets are cellular.

Cellular Data Network:

are some of the parameters for you to connect cellular data. If you want to set it up wrong, you can't connect to cellular data.

Set "-" General - > Network -> Cellular Data Network as follows.

Cellular data. apn:cmnet

Username: (not filled).

Password: (not filled).

MMS. apn：cmwap

Username: (not filled).

Password: (not filled).

MMSC: MMS**::80

Maximum MMS message size: 102400

Finally, restart your phone.

Apple's cellular data is from the transmission to the exchange of data using packet technology, when the cellular data is turned off, it is equivalent to turning off the network, and the mobile phone cannot access the Internet. Cellular mobile data is mainly used in specialized mobile data communication systems, which can only provide mobile data users with a connection to packet-switched data network users, that is to say, the cellular mobile data network is equivalent to a traffic switch, and the cellular mobile data network must be turned on if you want to use the traffic to access the Internet.