abou mobile phone...

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Now that electronic product is our daily
It is inevitably triggering life "mobile
Phone ", and some say" cellular phone ".
But how does this phone work? General Phone
What's the difference from? Mobile phone mode
Generally speaking, I will present you today.
First of all, the mobile phone but one
"Rodeo". Initially the mobile is like a normal phone
Although the work is being used extensively now.
Some of its uses below
It is mentioned -

1. Saves phone number and address
2. Keep the calendar and the To-do list
3. Place an appointment and its alarms
4. Calculator
5. Email Benefits
6. Advantages of viewing web pages
7. General games
8. Works as a GPS, so where are you
   Are there
   You can also see its map.
9. Camera: You have digital in many mobile phones
   Camera
   You can upload photos by mail to another.
   Besides, mobile with more opportunities in the market
   The phone is coming to the market.
   Primary: Just starting from the mobile phone?
   It's hard to guess what to do. But the first two are that
   Technology is the ancestor of Rodeo and Telephone. this
   The combination of the two and the modern form is today's mobile
   Phone Graham Bell invented telephone 1876
   After 18 years and 18 years later, in 1894, the Marconi Radio
   Discover.
   Mobile Communications Before Mobile Phones
   Many people use the radio in the car for this
   Would have But its size is too big to be easy
   Could not roam hand in hand. And generally it is only 25
   With Channel via Central Antanan
   Would communicate. That means, the radio phone's
   The transmission capacity would have been 40 to 50 miles.
   And the number of the channels
   Due to being low, many people use one at a time
   Could not Now let's see how the current mobile phone
   Works. Currently a mobile phone or city
   The company shares a number of cells. Generally
   Each cell is equal to 10 square miles and is equal to sixth
   And each cell has a base station. Each and every
   The cell can be used to talk about 800 Frequency. Though mobile
   Many towers in a city to speak on the phone
   Needed but the number of users currently is very much
   Due to the high cost, the cost decreases and the merchant
   The way
   Is successful. Every town has a central office
   Keeps in touch with base stations or towers. this
   Central Offices Mobile Telephone Switching
   Office (MTSO) says. Cell mobile phone and base
   Station uses low powere transmissins. As a result
   The mobile phone is running very fast with battery
   As a result, today's mobile phones are so small
   The size has been made, and the future will be even smaller.
   When we do mobile, then control it
   SID (System Indentification Code) via Channel
   Accepts it and it's inside the mobile phone
   See it. Also contact it with MTSO
   Keeps it The location of the central office mobile phone is a
   Puts it in the database. That's when you're in the city
   The Central Office of the Central Office
   Is in the database. Whenever someone calls you,
   Then this Central Office comes out of its database
   You are near a tower, and the tower
   From the frequency of your mobile phone
   Contact the two contacts
   Gives. And you can talk.
   Another big advantage of mobile phones is that you are in the car
   Or you can talk about anything else while running.
   When you speak, speak from one cell to another
   If you are looking forward to a cell, then now
   Due to the increase of distance from the used tower
   Connecting to another tower, as a result
   You go from one place to another
   You can continue your conversation without any hesitation.
   The mobile is small, but the moments in the moment
   You can do so much because it's inside
   DSP (Digital Signal Processor) is the reason for today
   Mobile is so smart!
   What is Duplex Channel?
   Mobile phone duplex channel
   Use it. You may have a waqtiki which is the police sergeant
   Use it. Use this walkie single channel
   Do it. That's why only talking or listening is possible. One
   It is not possible to talk and listen to both. Such as
   In the waqtiki the word Sergeant terminates the word over
   Say Then the other side talked about it. But then
   Use a duplex-channel on mobile phones
   Because of that, you talk to one and just like a phone
   You can listen.
   What is GSM?
   GSM is an international standard which is essentially in Europe,
   In large numbers in Asia, America, Africa and Australia
   Is used. The GSM is also very popular in Bangladesh
   More than The rural phone also uses this GSM.
   GSM from 900 MHz in Europe and Asia
   1800 MHz goes and America is 1900
   Moves to Megaherge. You buy gsm phone
   To use in Bangladesh, you only need SIM card
   To buy the SIM Subscriber indenification module. this
   SIM card basically looks like a small chip, of which
   Inside the mobile company's connection ID and user
   Information is stored. As a result that
   Insert your SIM card in any set and immediately
   It will work as you do.