A wireless modem is a modem that lets you connect rather than the telephone system. When connected, you are directly linked to your ISP and from there may access the Internet.

These devices can connect to USBs, or even different serial ports. The speeds achieved are similar to dial-up, so don’t expect to be streaming YouTube videos anytime soon.

Mobile phones and PDAs can be used to form a wireless access point in connecting a computer to the Internet. ExpressCard and Compact Flash modems are also used for such access.

Various Service Providers

United States

• AT&T Mobility
• Alltel
• Cricket Communications
• T-mobile
• Sprint Nextel Corporation
• Verizon Wireless

UK

• 3 (telecommunications)
• O2 plc
• Orange SA
• T-mobile
• Vodafone

Spain

• Movistar
• Orange (brand)
• Vodafone
• Yoigo

India

• Airtel
• BSNL
• Reliance Mobile
• Tata Indicom
• Virgin Mobile India
• Vodafone Essar
• VSNL

Israeli

• Cellcom
• Orange Israel
• Pelephone

Australia

• 3 Mobile
• Optus
• Telstra
• Virgin Mobile
• Vodafone

With the initial release of 2G (2nd generation), the speeds quickly went up from about 2.4 kb/s to 14.4 kb/s. Even so, the technology still required the user to connect to a dial-up Internet service provider. Soon, 2.5G came out and it utilized a technique called packet switching for the voice data and other data. Packet switching is a network communication method in which data is fit into little block called packets, and each packet is then more efficiently routed to increase the link capacity and quality of communication. Speeds of the 2.5G networks were usually around 30-40 kb/s. As of now, technologies such as WiMAX have announced that internet connection sharing may be capable over particular regions rather than just a local wifi, potentially eliminating the need for wireless routers.

Technologies used

• EDGE
• CDMA2000
• CDPD
• GAN
• GPRS
• GPRS Core Network
• HiperMAN
• HSDPA
• iBurst
• IP Multimedia Subsystem
• UMTS
• WiBro
• WiMAX

Hacking

There have been accounts of users successfully gaining access to free internet while in the range of GPRS (General packet radio service) transmitters. There is a known hack that involves using a prepaid Airtel card to gain free access. Other hacks involve exploiting flaws in the BSNL and Vodaphone servers in order to use the GPRS system free of charge. Another tactic involves pinging servers of GPRS providers that allows the hacker to obtain an IP address that may be used to access the network as well. With all of these methods available, some may find it easy to gain the free services. Keep in mind however, that doing so may involve the offender in some complications with the law.

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