Because the frequency band of WiFi mobile phone is free all over the world and does not need any telecom license, WLAN wireless devices provide a universal wireless air interface with extremely low cost and extremely high data bandwidth. Users can browse the web quickly in the WiFi coverage area, and answer and make calls anytime and anywhere. And other broadband data applications based on WLAN, such as streaming media and online games, are worthy of users' expectation. With the function of WIFI, we can make long-distance calls (including international calls), browse the web, send and receive emails, download music and transmit digital photos. Don't worry about slow speed and high cost.
The full name of WiFi is wireless fidelity, also known as 802. 1 1b standard. Its biggest advantage is its fast transmission speed, which can reach 1 1Mbps. In addition, it has a long effective distance and is compatible with various existing 802. 1 1DSSS devices. With the recognition of Centrino, a laptop chipset proposed by Intel, this technology has gradually become a topic of concern. However, since the end of 2005, many mobile phone manufacturers, especially the brands that mainly produce smart WiFi phones, began to introduce WiFi into their products.
Now the coverage of WiFi in China is more and more extensive, and high-end hotels, luxury residential areas, airports and cafes all have WiFi interfaces. When we travel and work, we can surf the Internet in these places with our handheld devices.
At present, WiFi mobile phones on the market are divided into "single mode WiFi mobile phones" and "dual mode WiFi mobile phones".
Dual-mode WIFI mobile phone refers to a mobile phone with WIFI communication mode and another communication mode (GSM, etc.). ). Dual-mode WIFI mobile phones are common in the market and suitable for personal use, but the call quality is not very clear and the call delay is long.
Although there is only one call mode, single-mode WiFi mobile phone is favored by enterprises and groups because of its own characteristics. Its main features are:
(1): The call is clear and timely;
(2): Because of the network session, the call cost is low;
(3): strong flexibility, and the group can talk anytime and anywhere;
(4): No wiring is required.
(5): Simple equipment
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