Where is the mobile phone number starting with 145?

The mobile phone number at the beginning of 145 is not a traditional mobile phone number and has no SMS function, so there is no definition of location and area. The number at the beginning of paragraph 145 is generally the user number of 3G wireless network card. China Unicom's 3G wireless network card service is based on the mobile communication network, providing high-speed wireless Internet access services for computer users anywhere within the coverage of 3G mobile communication network.

The number of 145 is the exclusive number segment of the current network card, such as 145 for Unicom and 147 for mobile. However, the network card cannot use voice call service, but can only use Internet service and short message service (the network card in Unicom 145 can send and receive short messages). 14 cards can be purchased in the nearby mobile, China Unicom and telecom business halls.

Wireless network card is a terminal wireless network device, which uses wireless signals for data transmission without wired connection. According to different interfaces, wireless network cards mainly include PCMCIA wireless network cards, PCI wireless network cards, MiniPCI wireless network cards, USB wireless network cards and CF/SD wireless network cards.

The biggest difference between a wireless network card and a wired network card is that it does not need to connect a network cable, but transmits information through infrared rays or electromagnetic waves. Due to the rapid development of network technology, the highest speed of wireless network card adopting IEEE802. 1 1b standard can reach 22Mbps.

The function of wireless network card is equivalent to cable modem, which is also commonly known as "cat". It can use the SIM card of the mobile phone to connect to the Internet anywhere with wireless phone signal coverage. Its common interface types are PCMCIA, USB, CF/SD and so on. Wireless network cards are mainly divided into GPRS and CDMA. Its speed will also be disturbed by various obstacles such as walls and other wireless signals such as mobile phones and microwave ovens.