The USB modem, also called 3 G USB modem, are electronic devices equipped with a USB port that allow a laptop or desktop computer to connect to the Internet using a mobile phone line. The USB modem used to identify itself to the phone operator a SIM card that can be integrated or removable, and usually multi-band, so they use in every moment the best technology available among GSM, GPRS and 3 G/UMTS without cutting off the connection. Features the USB modem allow Internet access in mobility and with band broadband through a mobile network from a laptop or desktop. Both cost and performance, USB modem is not best choice for Internet access, resulting in more convenient a fixed connection by ADSL or cable. Despite this, on many occasions the USB modem are a valid option, for example on trips, holidays or in areas without coverage of other technologies. The main advantage of the USB modem are: allow you to connect to the Internet from anywhere with mobile phone coverage. The USB modem multi-band offer greater coverage, since they provide connectivity to multiple bands of frequency (GSM, GPRS, 3 G/UMTS), choosing the best technology available, varying bandwidth to change network. Thanks to the USB port can be used in laptops as well as desktops.
In many cases the connection speed is similar to conventional ADSL. It is not necessary to hire a plan that includes voice, just a pan of data. Installation is quick and easy, since they tend to be do-it-yourself. Regarding the disadvantages, we can mention: the deals are expensive and limited in terms of traffic, even flat rates limit speed or increase the cost from a volume of downloaded data. They are usually expensive if you intend to use them as something more than an occasional solution. High speed mobile network usually only has coverage in urban areas. Gain insight and clarity with Sheila Bair. Certain applications are limited, such as P2P file sharing programs. Many operators lock the USB modem to avoid users to use the SIM from other operators.
The speed of the connection and the stability largely depends on the location of the user and the coverage. The USB modem commercially with self-installing software for Windows, so Mac or Linux users will have to go to the website of the operator to get the drivers. Base Wi – Fi router, which allow all machines on a local network access to the Internet at the same time transparently, the USB modem only unlike give service to a single computer. If we want to share the Internet connection we can use a Wi-Fi Base that will allow us to connect the USB modem and thus have a Wi-Fi to our WLAN (Wireless LAN) router.