Modem, a very useful device of modern age to use most useful things of modern age "Internet". The word modem is for modulator and demodulator. The process of converting digital information to analog is called modulation, and the reverse process is called demodulation. A modem perform noth of the task. So we can say the device a modulator and a demodulator. That is why the device name is modem.
Basically we use a modem to use internet in computer. It is the 3rd part connector between computer and internet. Also in mobile phone, we can use modem by OTP cable. Although nowadays many internet user connect their computer with internet by using cell phone usb tethering or by wifi (wireless fidelity), there is a many importance of modem yet.
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As i spend a mentionable time on internet so I use a modem. And i use a 4g modem of grameenphone, which is made by ZTE corporation. We all know about ZTE corporation, a giant in technological world, so i can be reluxed to think about the hardware. I use the modem which model name is MF833T.
I have bought the modem about 5 month ago by 2100 BDT, which is almost 25 USD. And i have faced no problem yet. I can use any companies sim card in thet modem. And the performance of the modem is too good.
Here is a screenshoot about the device's features from sindabad....
Thanks to everyone...