Wi-Fi
WiFi Phones
From their user interface to how they work, WiFi phones are a lot like cell phones . Like a basic cell phone, a WiFi (Wireless Fidelity) phone has a printed circuit board(PCB) that connects:
- A processor
- A speaker and a microphone
- A numeric keypad and other function keys
- A lithium ion battery
- A screen, usually aliquid crystal display (LCD)
- An antenna
- Memory
Both types of phones also send and receive signals as radio waves. The difference is that WiFi phones use different frequencies than cellular phones do. Cell phones use 824-MHz to 894-MHz frequency bands. WiFi phones that use the 802.11b or 802.11g standards transmit at 2.4 GHz. Phones that use the 802.11a standard transmit at 5 GHz.
Nowadays, the appearance of I-Phone, I-Pad, Android Tabs and Phone are very fastest that make challenging of the phones in the past trend. The phones now is very smart & multi function enabled in this new technologiest.
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