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What are Unlocked Mobile Phones and Cell Phones?


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Sep 14, 2010, 12:41 AM

Post #1 of 1 (500 views)
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What are Unlocked Mobile Phones and Cell Phones?
An unlocked cellular phone is a device that works with any GSM (Global System of Mobile Telecommunications) service provider. GSM cellular service providers program phones so that the handheld devices only accept SIMs (Subscriber Identification Modules) from that particular service. This "lock" can be undone to enable the phone to accept SIM cards from other services. You may want to unlock your phone if you want to keep using the device, but switch to a different operator. Advantages
  1. An unlocked phone will not be permanently tied to just one network, and it can be used with any GSM service provider. If you want to keep your phone but move to a different service provider, you can do that with an unlocked phone. After unlocking, simply store the device when you do not need it, and use it as a backup when your main phone has problems. Another advantage is when you travel abroad; you can use other GSM operators with your unlocked phone without paying the usually higher roaming rates that your own network may charge.
Compatibility
  1. An unlocked phone works with compatible GSM operators in more than 200 countries, depending on frequency. GSM providers operate in different frequencies, usually 850 MHz, 900 MHz, 1,800 MHz and 1,900 MHz. All GSM phones are built to support one or more of these available frequencies, and after unlocking, the phone will work with all networks that operate on its frequency band.
SIM
  1. A SIM card is a small, flat rectangular card that fits into a predefined slot inside your GSM phone. Cellular service providers who operate on GSM technology identify subscribers solely based on the SIM. Since GSM service providers do not physically associate a mobile phone with a subscriber, you can change your mobile phone without any consequences. As long as you use the SIM, you will be identified regardless of mobile phone.

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Watch Phones:
Since the invention of the Watch Phone which has integrated wrist watch and cell phone together, many stylish men have diverted their interests of cell phone to the Watch Phones, among of which are super stylish. Don't be curious in seeing some young men seemingly talking to themselves, in fact, they are on call with their Bluetooth headset accompanied with the Watch Phones. How cool are they after you know the truth. Wow, the Watch Phones are that mysterious. Do you want to keep one Cell Phone Watch? Have the chance to throw away your Cell Phone and Watch you carried separately all the time? Then try the Cell Phone Watch!
Quad Band Phones:
Before buying a cell phone from Mobilephones Direct 2 U, do you worry that whether this phone works or not in your country, and what does “Quad-band” mean?
Can Quad-band phones work in your country?
Now, Mobilephones Direct 2 U gives you answer:
Quad-bandincludes four GSM (Global system for Mobile Communications) work frequencies: 850MHz, 900MHz, 1800MHz and 1900MHz.
GSM networks are used by over 3 billion people across more than 212 countries and territories.
900/1800/1900MHz are the most commonly used frequencies around the world, and 850MHz is used in some areas of America. Quad-band phones can switch frequencies among 850/900/1800/1900MHz automatically, and chose the strongest signal silently.
Now, chose your favorite Quad-band cell phone in confidence, Mobilephones Direct 2 U provides you the high-quality, the most inexpensive Quad-band cell phone.
Dual Sim Phones:
Dual Sim Phones let you get two calls simultaneously, Dual SIM phone indicates that one cell phone with two SIM card slots, and you can receive two calls simultaneously (namely dual standby). People are always pesky in taking two cell phones when on business trip. Now, Dual SIM phones have solved this issue, you don't have to take two cell phones with you, unnecessary to switch between two SIM cards, it is rather easy and convenient for you to receive two calls from two different countries at one time, that saves you much time and energy, more importantly, your caller never get a message such as "Sorry, you dialed number is busy now, please try later" but instead will get your caller through instantly.
Mobilephones Direct 2U is an online electronics company. We sell the very latest consumer unlocked mobile-phones/cell phones products from our suppliers in China and make them available to you at unbeatable and reasonable prices. This is the best opportunity to buy direct from Mobilephones Direct 2 U and get the latest mobile-phone/cell phone products you are looking for with quality and guarantee!
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