SIM Cards
A SIM (subscriber identity module) is an electronic card which securely stores the key identifying a mobile phone service subscriber, as well as subscription information, preferences and text messages. The equivalent of a SIM in UMTS is a Universal Subscriber Identity Module (USIM).
The SIM stores network state information such as its current location area identity (LAI). If the handset is turned off and back on again it will take data off the SIM and search for the LAI it was in. This saves time by avoiding having to search the whole list of frequencies that the telephone normally would. Each SIM is uniquely identified by its ICCID [International Circuit Card ID].
SIM cards identify users uniquely by holding an IMSI.
What is a SIM card?
The SIM (Subscriber Identification Module or Subscriber Identity Module) card - a.k.a. "smart card" - holds all of a subscriber's personal information and phone settings. In essence, it is the subscriber's authorization to use the network. It also holds the phone number, personal security key and other data necessary for the handset to function. The card can be switched from phone to phone, letting the new phone receive all calls to the subscriber's number.
How do SIM cards functions?
The SIM is inside each handset and functions as its digital brain. The authentication and encryption capabilities of the SIM prevent your phone from being stolen and your calls from being eavesdropped on. The SIM's digital memory, which stores information like your rate plan, phone number and service features, also allows you to easily personalize your service and contains user ID and billing information that can be switched between different phones. So, with your SIM card installed, you can make or receive calls personally even when you're using a borrowed phone. Upgrading your phone is as simple as slipping your SIM card into your new phone.
In July 2005, the Finnish government announced that a Citizen Certificate - a government-guaranteed 'electronic identity' included in a SIM card - will be made available to every individual resident in Finland before the end of 2005, allowing mobile phone users to access e-services on the move. The Citizen Certificate has been described as "basically an e-ID card that will be compatible with several hardware devices, such as mobile phones, PDAs, personal computers, Digital TV sets, and public web kiosks".
[1] The first SIM cards with embedded Citizen Certificates have already been made available in selected localities.
The use of SIM card is mandatory in the GSM world, whereas the SIM (RUIM) is not very popular in the CDMA world.
The major SIM card vendors in the market are Axalto, Gemplus, G&D and Oberthur Card Systems.
W-SIM is a SIM card which also integrates core cellular technology into the card itself.
Wednesday, April 26, 2006
GSM Technology
GSM Technology
GSM (Global System for Mobile Communications) leads the world as the fastest growing, most reliable and advanced digital technology available in the marketplace today. GSM provides integrated voice mail, high-speed data, fax, paging and short message services capabilities. GSM customers enjoy secure communications, and GSM offers unparalleled call privacy and fraud prevention. As members of the GSM Global Network, GSM subscribers can use their phones at home, across town, across the continent, or around the world (except for with country specific SIM cards). GSM operates on the multiple spectrum frequency bands used around the world - 1900MHZ, which is used in North America and 900MHz and 1800 MHz for other locations. Different mobile phone networks operate at different frequencies, which means that if you wish to use your mobile phone outside your home country, you generally need a handset that supports multiple frequency bands. Make sure that the celluar phone you are interested in is compatible with the GSM band of the country you will use it in.
As a general Guideline:
Dual-band - A dual-band phone operates at both the 900 MHz and 1800 MHz spectrum. Dual-band works in Europe, Africa, Asia, Australia, New Zealand and much of South America.
Tri-band - A tri-band phone operates on three frequency bands, 900 MHz, 1800 MHz and 1900 MHz, allowing you to use it in Europe, Africa, Asia, nearly all of North America, Australia and New Zealand.
Quad-band - A quad-band phone allows you to roam almost anywhere globally. It covers the 850 Mhz, 900 MHz, 1800 MHz and 1900 MHz frequency ranges. Many countries in South America only have 850 MHz GSM service while both 1900 MHZ and 850 MHz GSM services are supported in the USA. 99% of all countries use the GSM standard. WE believe eventually GSM will be the only cell phone standard in the world.
The GSM network provides the best digital wireless voice quality in the world today.
GSM (Global System for Mobile Communications) leads the world as the fastest growing, most reliable and advanced digital technology available in the marketplace today. GSM provides integrated voice mail, high-speed data, fax, paging and short message services capabilities. GSM customers enjoy secure communications, and GSM offers unparalleled call privacy and fraud prevention. As members of the GSM Global Network, GSM subscribers can use their phones at home, across town, across the continent, or around the world (except for with country specific SIM cards). GSM operates on the multiple spectrum frequency bands used around the world - 1900MHZ, which is used in North America and 900MHz and 1800 MHz for other locations. Different mobile phone networks operate at different frequencies, which means that if you wish to use your mobile phone outside your home country, you generally need a handset that supports multiple frequency bands. Make sure that the celluar phone you are interested in is compatible with the GSM band of the country you will use it in.
As a general Guideline:
Dual-band - A dual-band phone operates at both the 900 MHz and 1800 MHz spectrum. Dual-band works in Europe, Africa, Asia, Australia, New Zealand and much of South America.
Tri-band - A tri-band phone operates on three frequency bands, 900 MHz, 1800 MHz and 1900 MHz, allowing you to use it in Europe, Africa, Asia, nearly all of North America, Australia and New Zealand.
Quad-band - A quad-band phone allows you to roam almost anywhere globally. It covers the 850 Mhz, 900 MHz, 1800 MHz and 1900 MHz frequency ranges. Many countries in South America only have 850 MHz GSM service while both 1900 MHZ and 850 MHz GSM services are supported in the USA. 99% of all countries use the GSM standard. WE believe eventually GSM will be the only cell phone standard in the world.
The GSM network provides the best digital wireless voice quality in the world today.
Thursday, April 20, 2006
EDGE TECHNOLOGY
EDGE - Used in Mobiles
Connect With Speed
Enhanced Data rates for Global Evolution (EDGE) enables data connections three times faster than GPRS within the same multislot class. Like GPRS, you're billed for the data you transfer, not for the time you spend connected.
The Benefits of EDGE
EDGE opens up a lot of possibilities for connecting to data networks on your mobile phone, making it far less frustrating to stream video and download larger files.
How EDGE Works
To use EDGE, you need a phone that supports it, a subscription from your network operator that supports EDGE, and the proper settings.
EDGE is based on General Packet Radio Service, which sends "packets" of data over a radio wave (on the GSM network). Packet switching works like a jigsaw puzzle: your data is split into many pieces, then sent over the network and reassembled at the other end. GPRS is just one of the ways to transport these jigsaw puzzles.
What You Can Do With EDGE
• Connect to your office or personal email account - you can even set your phone to check for email automatically using data sync
• Browse the Internet on your phone
• Synchronize your phone and office calendar while you're out of town
• Download ringing tones, graphics, and games
• Play online games (one example of this is the N-Gage Arena)
• Send and receive MMS messages
• Use your phone as a modem, connecting your laptop to the Internet
• Subscribe to mobile services that bring you personalized information like sports updates, breaking news, horoscopes, share prices, the daily trip-hop-country single...
• Use Java applications that require a network connection
• Chat using instant messaging on your phone
• Update your friends' Presence status
EDGE (based on GPRS) is better than a GSM connection for data that's transferred in larger "chunks." And unlike voice calls and dial-up Internet connections, you pay for how much you transfer, not for how long you're connected. You can have an active connection all the time if you like, which is nice if you need to synchronize periodically with a network or if you're expecting an important email. If you need to make or answer a phone call, your EDGE connection is automatically disconnected for the duration of the call.
When you talk on a mobile phone, a continuous connection to a channel is reserved for you on the GSM network, which means nobody else can use that channel. With EDGE, you can still have a continuous connection, but you only use the channel when you're sending data.
So, you might be connected to a channel all the time, but you only actually use it when you're sending data. One channel can be shared by many people. This is why you're billed for data transferred, not for time.
EDGE is significantly faster than than CSD (Circuit Switched Data, sometimes just called GSM Data). However, you may find transfers slower than maximum speed during peak hours in busy cell networks, because voice connections usually take precedence. As with GPRS, the data transfer rate also depends on your multislot class
Pulses and Bits
EDGE uses a slightly different technology than GPRS called 8PSK, or 8-Phase Shift Keying. Here's a very simplified explanation: data is sent over GPRS and EDGE in pulses. With GPRS, a pulse can carry 1 bit of data, but with EDGE, one pulse carries 3 bits. So it's not that the data actually moves faster, it's that more can be moved at any given time.
What if EDGE Isn't Covered?
In areas where an EDGE network is not available, connections will fall back on GPRS as a default.
Connect With Speed
Enhanced Data rates for Global Evolution (EDGE) enables data connections three times faster than GPRS within the same multislot class. Like GPRS, you're billed for the data you transfer, not for the time you spend connected.
The Benefits of EDGE
EDGE opens up a lot of possibilities for connecting to data networks on your mobile phone, making it far less frustrating to stream video and download larger files.
How EDGE Works
To use EDGE, you need a phone that supports it, a subscription from your network operator that supports EDGE, and the proper settings.
EDGE is based on General Packet Radio Service, which sends "packets" of data over a radio wave (on the GSM network). Packet switching works like a jigsaw puzzle: your data is split into many pieces, then sent over the network and reassembled at the other end. GPRS is just one of the ways to transport these jigsaw puzzles.
What You Can Do With EDGE
• Connect to your office or personal email account - you can even set your phone to check for email automatically using data sync
• Browse the Internet on your phone
• Synchronize your phone and office calendar while you're out of town
• Download ringing tones, graphics, and games
• Play online games (one example of this is the N-Gage Arena)
• Send and receive MMS messages
• Use your phone as a modem, connecting your laptop to the Internet
• Subscribe to mobile services that bring you personalized information like sports updates, breaking news, horoscopes, share prices, the daily trip-hop-country single...
• Use Java applications that require a network connection
• Chat using instant messaging on your phone
• Update your friends' Presence status
EDGE (based on GPRS) is better than a GSM connection for data that's transferred in larger "chunks." And unlike voice calls and dial-up Internet connections, you pay for how much you transfer, not for how long you're connected. You can have an active connection all the time if you like, which is nice if you need to synchronize periodically with a network or if you're expecting an important email. If you need to make or answer a phone call, your EDGE connection is automatically disconnected for the duration of the call.
When you talk on a mobile phone, a continuous connection to a channel is reserved for you on the GSM network, which means nobody else can use that channel. With EDGE, you can still have a continuous connection, but you only use the channel when you're sending data.
So, you might be connected to a channel all the time, but you only actually use it when you're sending data. One channel can be shared by many people. This is why you're billed for data transferred, not for time.
EDGE is significantly faster than than CSD (Circuit Switched Data, sometimes just called GSM Data). However, you may find transfers slower than maximum speed during peak hours in busy cell networks, because voice connections usually take precedence. As with GPRS, the data transfer rate also depends on your multislot class
Pulses and Bits
EDGE uses a slightly different technology than GPRS called 8PSK, or 8-Phase Shift Keying. Here's a very simplified explanation: data is sent over GPRS and EDGE in pulses. With GPRS, a pulse can carry 1 bit of data, but with EDGE, one pulse carries 3 bits. So it's not that the data actually moves faster, it's that more can be moved at any given time.
What if EDGE Isn't Covered?
In areas where an EDGE network is not available, connections will fall back on GPRS as a default.
S60 Software
Hi Guys,
This time i'ave planned to post really some interesting things.......ok let me start with S60 Software ,Which we use in Mobile phones....
S60 Software
What is S60 Software?
S60 software is what makes your S60 device more like a small computer than a conventional mobile phone.It provides both the basic phone functionality, and the advanced applications expected in today's phones.Just as importantly, it provides the intuitive, full-color user interface that makes using your handheld device as simple and as enjoyable as possible.
S60 software enables you to download additional applications to your device, access email and Internet, play games, and listen to music. It also allows you to run several applications at the same time without closing them.
S60 software lets you personalize the display and alter the appearance of your phone's user interface (UI) by using UI themes to change the background, icons, colors, and graphics or by re-arranging the menu to match your priorities. In addition, S60 devices can be easily connected to your PC via USB, Bluetooth or IrDA to transfer pictures, music, videos, documents and applications, and to synchronize your calendar, contacts, and email.
Whether your S60 device was chosen with imaging, business, music, or games in mind, you can choose from thousands of add-on applications to tailor your smartphone and keep up with your changing needs and tastes.
S60 Applications From games and entertainment to personal productivity and business, find out more about the applications you're looking for at www.s60.com
Frequently Asked Questions
Frequently Asked Questions: Find answers to frequently asked questions about S60 software.
1. What is S60 software?
S60 software consists of a user interface and all of the software and applications necessary to run a smartphone. S60 software runs on the open Symbian OS (operating system). In addition to existing applications, you can also install additional applications.
2. What are the main benefits of S60 software?
S60 software allows you to do more with your device: Install add-on applications, tailor your device's appearance and functionality, browse the Internet, send and receive emails, and synchronize your device with your PC.
3. Who makes or owns S60 software?
S60 is developed by Nokia and licensed by some of the foremost mobile device manufacturers in the world.S60 software, built on the Symbian OS (operating system), is the world's leading smartphone platform, with millions of devices and thousands of mobile applications on the market.
4. Where can I find additional applications or software for my device?
There are many places where you can find additional applications and content. Take a look at your operator portal or visit www.s60.com/applications for more information.
5. How do I add new applications or software to my device?
You can add content to your S60 device in many different ways. You can download content with your browser, have it sent via MMS, or transfer it from your PC via Infrared or Bluetooth connections.
There are many places you can download content, such as your operator portal or other service providers' web sites. Go to an operator portal, click on a link to download the application or software, and install it as guided on the display of your device. It really is that simple. For more detailed information, refer to your device's user guide.
6. How do I remove applications or software that I no longer need?
You can delete the application in the Application Manager that can be found in the Menu of your device. For more detailed information, refer to your device's user guide.
7. Can my device get a virus, or other malware, from downloading new applications?
You can help protect your device against mobile malware by being careful when accepting applications sent via Bluetooth or as an MMS attachment. As a rule of thumb, don't download, approve or install applications from unknown or unreliable sources.
To improve security, the latest S60 3rd Edition software includes a new security architecture that can be used to further improve protection against mobile malware. For added protection, S60 software allows you to add anti-virus and encryption applications.
This time i'ave planned to post really some interesting things.......ok let me start with S60 Software ,Which we use in Mobile phones....
S60 Software
What is S60 Software?
S60 software is what makes your S60 device more like a small computer than a conventional mobile phone.It provides both the basic phone functionality, and the advanced applications expected in today's phones.Just as importantly, it provides the intuitive, full-color user interface that makes using your handheld device as simple and as enjoyable as possible.
S60 software enables you to download additional applications to your device, access email and Internet, play games, and listen to music. It also allows you to run several applications at the same time without closing them.
S60 software lets you personalize the display and alter the appearance of your phone's user interface (UI) by using UI themes to change the background, icons, colors, and graphics or by re-arranging the menu to match your priorities. In addition, S60 devices can be easily connected to your PC via USB, Bluetooth or IrDA to transfer pictures, music, videos, documents and applications, and to synchronize your calendar, contacts, and email.
Whether your S60 device was chosen with imaging, business, music, or games in mind, you can choose from thousands of add-on applications to tailor your smartphone and keep up with your changing needs and tastes.
S60 Applications From games and entertainment to personal productivity and business, find out more about the applications you're looking for at www.s60.com
Frequently Asked Questions
Frequently Asked Questions: Find answers to frequently asked questions about S60 software.
1. What is S60 software?
S60 software consists of a user interface and all of the software and applications necessary to run a smartphone. S60 software runs on the open Symbian OS (operating system). In addition to existing applications, you can also install additional applications.
2. What are the main benefits of S60 software?
S60 software allows you to do more with your device: Install add-on applications, tailor your device's appearance and functionality, browse the Internet, send and receive emails, and synchronize your device with your PC.
3. Who makes or owns S60 software?
S60 is developed by Nokia and licensed by some of the foremost mobile device manufacturers in the world.S60 software, built on the Symbian OS (operating system), is the world's leading smartphone platform, with millions of devices and thousands of mobile applications on the market.
4. Where can I find additional applications or software for my device?
There are many places where you can find additional applications and content. Take a look at your operator portal or visit www.s60.com/applications for more information.
5. How do I add new applications or software to my device?
You can add content to your S60 device in many different ways. You can download content with your browser, have it sent via MMS, or transfer it from your PC via Infrared or Bluetooth connections.
There are many places you can download content, such as your operator portal or other service providers' web sites. Go to an operator portal, click on a link to download the application or software, and install it as guided on the display of your device. It really is that simple. For more detailed information, refer to your device's user guide.
6. How do I remove applications or software that I no longer need?
You can delete the application in the Application Manager that can be found in the Menu of your device. For more detailed information, refer to your device's user guide.
7. Can my device get a virus, or other malware, from downloading new applications?
You can help protect your device against mobile malware by being careful when accepting applications sent via Bluetooth or as an MMS attachment. As a rule of thumb, don't download, approve or install applications from unknown or unreliable sources.
To improve security, the latest S60 3rd Edition software includes a new security architecture that can be used to further improve protection against mobile malware. For added protection, S60 software allows you to add anti-virus and encryption applications.
MEN AND WIVES
MEN AND WIVES
Every man should get married some time; after all, happiness is not the only thing in life!!
--Anonymous
Bachelors should be heavily taxed. It is not fair that some men should be happier than others .
--Oscar Wilde
Don't marry for money; you can borrow it cheaper.
--Scottish Proverb
I don't worry about terrorism. I was married for two years.
--Sam Kinison
A psychiatrist is a person who will give you expensive answers that your wife will give you for free.
--Anonymous
Bachelors know more about women than married men; if they didn't, they'd be married too.
--H. L. Mencken
Men have a better time than women; for one thing, they marry later; for another thing, they die earlier.
--H. L. Mencken
"A man without a woman is like a fish without a bicycle."
- U2
Marriage is a three-ring circus: --engagement ring ---wedding ring ---suffering.
When a newly married couple smiles, everyone knows why. When a ten-year married couple smiles, everyone wonders why.
Love is blind but marriage is an eye-opener.
When a man opens the door of his car for his wife, you can be sure of one thing: either the car is new or the wife.
I take my wife everywhere, but she keeps finding her way back to home always.
--Anonymous
I asked my wife, "Where do you want to go for our anniversary?" She said,"Somewhere I have never been!" I told her, "How about the kitchen?"
--Anonymous
We always hold hands. If I let go, she shops.
My wife was in beauty saloon for two hours. That was only for the estimate.
--Anonymous
She got a mudpack and looked great for two days.Then the mud fell off.
--Anonymous
She ran after the garbage truck, yelling, "Am I too late for the garbage?" Following her down the street I yelled, "No, jump in."
--Anonymous
Badd Teddy recently explained to me why he refuses to get to married. He says "the wedding rings look like minature handcuffs....."
--Anonymous
If your dog is barking at the back door and your wife yelling at the frontdoor, who do you let in first? The Dog of course...at least he'll shut up after u let him in!
--Anonymous
Every man should get married some time; after all, happiness is not the only thing in life!!
--Anonymous
Bachelors should be heavily taxed. It is not fair that some men should be happier than others .
--Oscar Wilde
Don't marry for money; you can borrow it cheaper.
--Scottish Proverb
I don't worry about terrorism. I was married for two years.
--Sam Kinison
A psychiatrist is a person who will give you expensive answers that your wife will give you for free.
--Anonymous
Bachelors know more about women than married men; if they didn't, they'd be married too.
--H. L. Mencken
Men have a better time than women; for one thing, they marry later; for another thing, they die earlier.
--H. L. Mencken
"A man without a woman is like a fish without a bicycle."
- U2
Marriage is a three-ring circus: --engagement ring ---wedding ring ---suffering.
When a newly married couple smiles, everyone knows why. When a ten-year married couple smiles, everyone wonders why.
Love is blind but marriage is an eye-opener.
When a man opens the door of his car for his wife, you can be sure of one thing: either the car is new or the wife.
I take my wife everywhere, but she keeps finding her way back to home always.
--Anonymous
I asked my wife, "Where do you want to go for our anniversary?" She said,"Somewhere I have never been!" I told her, "How about the kitchen?"
--Anonymous
We always hold hands. If I let go, she shops.
My wife was in beauty saloon for two hours. That was only for the estimate.
--Anonymous
She got a mudpack and looked great for two days.Then the mud fell off.
--Anonymous
She ran after the garbage truck, yelling, "Am I too late for the garbage?" Following her down the street I yelled, "No, jump in."
--Anonymous
Badd Teddy recently explained to me why he refuses to get to married. He says "the wedding rings look like minature handcuffs....."
--Anonymous
If your dog is barking at the back door and your wife yelling at the frontdoor, who do you let in first? The Dog of course...at least he'll shut up after u let him in!
--Anonymous
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