Unlock Cell Phones » Tri Band

Choosing The Best Cell Phone Antenna For Home

admin — Tue, 16 Mar 2010 08:06:55 +0000

Many types of cell phone antenna are available for home use. It can be hard to choose between them if you don't have enough information. You can get some advice from your wireless service provider. You can also look up information on cell phone antennas online, through search engines and other resources. Your available choices include cell phone signal booster antennas, large antennas, and a whole range of products in between.

Cell phone antennas or cell phone boosters can boost the reception of your wireless phone. This makes for fewer dropped calls and less static in your calls. When using the phone in an elevator or tunnel, the booster can be the difference between having a clear, audible phone call and a dropped or staticky one. Cell phone boosters are available for home use as well. There's a wide variety of products available, and some are better than others.

Cell phone antennas function because they're tuned to a specific frequency. However, this frequency doesn't reach all homes equally. Some people's houses may be badly located, so a booster can help you to get a good signal.

Cell phone antenna boosters are easy for anyone to use. They work by enchancing the signals going into and coming out of your phone. This results in a clearer call and better reception in places where the signal is usually poor. Dual and tri band cell phone antenna boosters are available for home use, both 800 and 900 MHz, and in analog and digital formats. Many people keep their land lines, despite not wanting to have one, because their cell phone won't work well in their house. Because of this unreliability, they acquire monthly land line costs in addition to their cellular bill. A booster could solve these problems and reduce their expenses.

If you do decide to get a cell phone antenna booster to use in your home, you'll be able to use your phone inside, instead of making calls on the porch or in the yard. Some boosters are available in very affordable ranges - under ten dollars! Many of the cheapest kind don't work very well, but the midrange cell phone boosters are affordable and reliable.

Those with special needs might decide to spring for the high-end models, which can run up to several hundred dollars. A few dollars could save you hundreds over the course of a few years, just by not having to maintain a land line. A cell phone antenna booster also prevents you from dropping calls, having to listen to the crackle and pop of static, and missing vital business calls. Investing in a cell phone booster antenna could really make the difference in the quality of your calls.

By: Tomaz Mencinger

Very Popular Unlocked Cell Phone Sony Ericsson K810

admin — Sun, 27 Dec 2009 06:34:01 +0000

Sony Ericsson introduced new cell phone Sony Ericsson K810. It is a sleek handset, measuring in at just 17mm thick, an improvement on its predecessor, the K800, which measures 22mm thick.

The camera on the Cybershot branded handset is a 3.2 megapixel autofocus camera, with built in Xenon flash. On screen illuminated icons are used to indicate shortcuts to camera settings (such as turning flash on and off, camera timer, etc) by using the hard keys on the keypad instead of trawling through the camera settings menu. The Sony Ericsson K810 offers a variety of features to ensure you take the perfect picture every time. As well as the built in Xenon flash, the Sony Ericsson K810 has red eye reduction, and supports Best pic, which takes 9 pictures in quick succession allowing you to choose the best of them to keep.

Once finished, pictures are easily shared with friends and family, thanks to the built in blog support. You can upload pictures taken straight to your blog, or transfer them to another phone using Bluetooth. Connectivity to your PC is simple and straightforward, as well as using Bluetooth the Sony Ericsson K810 supports USB 2.0 connectivity for simple fast data transfer.

The Sony Ericsson K810 is a 3G handset, and also supports tri band GSM networks. The screen is impressive, 240×320 pixel QVGA, TFT, supporting 262,000 colors. The handset has built in 64MB of memory which can be expanded to 2GB with an additional M2 Micro memory card.

But there were also some nifty Bluetooth accessories, and four other phones that while basic, are just what a significant amount of mobile users are looking for, rather than all bells and whistles.

The fact remains that it was very much evolution rather than revolution, at a time when some of Sony Ericsson's rivals (traditional and new) are unveiling all manner of breakthrough products. Take the Sony Ericsson K810, which is Sony Ericsson's flagship camera phone, but only has a 3.2 megapixel camera. Please purchase online www.phoneandbeyond.com

By: prabakar

The Cell Phone Mysteries, What are Dual Band, Tri Band and Quad Band Cell Phones and Where Will They Work?

admin — Sun, 20 Dec 2009 12:06:26 +0000

The world of the mobile phone is a confusing one these days, particularly for those wondering how to start a cell phone business. Few things are perhaps as confusing as GSM frequencies and GSM phones that seem to work in some parts of the world but not in others.

Multiple band cell phones and GSM frequencies can be especially confusing for anyone wondering how to start a cell phone business.

So what is the background behind the GSM network?

The GSM network was first suggested by a group of European technicians and policy makers in 1982 and it didn't take long for consumers and phone makers to adopt the new network after it first emerged in 1991. It wasn't long before there was growing GSM coverage in an increasing number of countries.

The GSM world grew quickly. There were more than one million subscribers spread over 70 carriers in 30 countries by the end of 1993.

Not only did the new GSM mobile network send and receive all of its information digitally, making it the first 2G mobile phone to be developed it also gave users a great deal of freedom on what they did with it. For the first time they were able to send short written messages to each other for a fraction of the price of a phone call, they could change their carrier and/or go to a different country without getting a new phone.

All they needed to do was to take one GSM SIM card out and replace it with another GSM card and they were in business.

But, as the unknown powers of the world decree, things shouldn't be that easy and the GSM frequencies set by most of the GSM networks had already been assigned to other purposes by the powers that be.

So, in a situation very similar to TV watchers and people with surveillance systems, a phone that worked in Sussex England wouldn't pick up anything in San Antonio in the US. Basically it wasn't a case of one GSM frequency fits all.

As a result, many cell phone makers create cell phones that can work with more than one band with some working with as many as 4 bands.

Still this doesn't mean there aren't questions and people are often left asking:

* What is GSM?

* What are the GSM frequencies?

* Why do GSM phones have more than one band?

* Will different frequencies work in different areas?

* How can I check if a phone will work in a particular area?

* How are multiple band phones defined and where will they work?

We're going to attempt to look at those questions in this article.

What is GSM?

GSM, Global System for Mobile communications (or the Acronym formally known as Groupe Spécial Mobile) is a wireless transmission standard used for mobile phones and, recently wireless modems. GSM and CDMA differ because GSM networks use a SIM card to store all the necessary information to send and receive calls where with CDMA phones everything is kept on the phones.

If you are looking at how to start a cell phone business and you don't have thousands in working capital GSM mobile phones will probably be a better option than CDMA as they won't be attached to a particular carrier and don't require you to be licensed to a particular provider to sell unlocked cell phones.

Another reason to select GSM over CDMA is that it will open up the potential customer base for each phone. As unlocked gsm phones can be used with any GSM networks. To date there is no such thing as an unlocked CDMA phone. When it comes to cell phone plans most providers (especially those in the states) love CDMA phones because it locks their consumers to them.

Why do GSM phones have more than one band?

GSM Phones come with more than one band so that they will work in more than one country as there is more than one GSM frequency and they are not universally transmitted.

As a result, wholesale cellphone manufacturers make GSM and GPRS phones with multiple cell phone bands so that they can work in multiple countries. Most cell phones work on two, three or even four bands. Quad band phones are the most flexible as they can be used all over the world and are often called international phones as a result.

How are multiple band phones defined and where will they work?

Multiple band phones are usually defined by how many GSM frequencies they can operate on and usually come in four different categories, dual band, tri band and quad band. If thinking about how to start a cell phone business it is important to remember the different type of bands as it could mean the difference between your customer getting a high performance phone that they're happy with and can and them getting a shiny and costly paperweight.

Dual band phone works with two GSM frequencies and, depending on where the phone is made will probably work for the frequencies 900MHz and 1800MHz. These phones are usually less expensive than other types of cell phone and it can be a good way to get a cheap cell phone that will still send SMS MMS and act as a WAP cell phone.

The tri band phone runs on three frequencies and can be used in most countries. This unlocked GSM cell phone is a cheaper option than the quad band phone but safer than a dual band phone.

Quad band phones, or international phones as they are sometimes called, use four bands and can be used anywhere in the world. If you are looking to start a mobile phone business and you wonder what is an unlocked phone guaranteed to sell well and give you the least trouble with customers it will probably be this type of cellphone.

What Are The GSM Frequencies?

Almost all of the world works on the frequencies 850Mhz, 900MHz, 1800MHz, 1900Mhz and in some rare circumstances 400MHz although there are some other frequencies in other locations.

Thankfully too areas where each frequencies work is fairly easy to define in the very general sense (although it always pays to check). So when you're looking for what areas a cellular phone will work in you should be able to follow a rough guide.

So which areas use GSM 900 and 1800 MHZ signals and which areas use the GSM 850Mhz and 1900MHz frequencies can usually be broken into two groups.

If you are traveling in with your cell phone in Oceania, Africa, Europe, Asia (except for Japan and Korea), the Middle East, Brazil and the Baltic region and looking for roaming networks then mobile network coverage will be either 900MHz, 1800MHz or 900MHz and 1800MHz.

If you are looking for a GSM world phone that will work in the US or South America then you're better sticking with a wireless cell phone that'll work on the 850Mhz and 1900MHz bands.

Will different frequencies work in different areas?

With the majority of the GSM world being broken into two main groups (those that take Most of the GSM world is roughly broken up into four main frequencies 900MHz and/or 1800MHz and 850Mhz and/or 1900MHz most unlocked GSM phones will work on one, two or three of the GSM frequencies around the world giving you some level of international roaming on an unlocked phone.

However, you possibly won't get any joy if for example you take a dual band phone designed for Europe and Asia and then try to use that bluetooth phone in the US.

How can I check if a phone will work in a particular area?

There are two ways to check if a phone will work in a particular area; the first is to get the phone band, which can usually be found on the product description.

If you're working through how to start a cell phone business and considering phones to stock, it doesn't matter if you're thinking about a multimedia mobile, WAP phone or GSM watch phone, the process should be the same. If you are sourcing cell phones from a wholesale supplier or wholesale dropship vendor put the ball into their court. They should have that information on their website or product advertising material for the unlocked cell phone.

Once you've got the GSM frequency the GSM phone worked on you can make sure it will work in your area.

If you are looking for a cellphone for yourself this could be as easy as calling your local service provider, or looking it up on sites like GSMworld dot com or worldtimezones dot com.

If you are wondering how to start a cell phone business then your best course of action is to list the frequencies on the description for the GSM cell phone, along with the phone's other features (like if it is a music phone or it has a good cell phone camera) and tell the person who wants to buy unlocked cell phones from you which parts of the world it will probably work in.

So it looks like cell phone bands and GSM frequencies aren't that scary after. It's just a case of knowing where to look and ensuring you've got the right phone for the right location.

Learn more about cell phone bands and the other great hints on how to start a cell phone business at http://www.chinavasion.com. Your best source of international cell phones and unlocked cell phones online today.

By: Rose Li

The Unlocked Cell Phone Sony Ericsson K850

admin — Tue, 08 Dec 2009 12:48:04 +0000

The Sony Ericsson K850 has HSDPA / GSM 850 / 900 / 1800 / 1900 network. The K850 is a Tri-Band HSDPA and Quad-Band GPRS/EDGE phone, which will be available in either Velvet Blue or Luminous Green. The Sony Ericsson K850 is a 5-megapixel camera phone that packs a lot of shooting power into one handset.

The Bluetooth mobile phone Sony Ericsson K850 Blue features include a 2.2 inch screen, easily scrollable menus, comes available in brushed metal with a blue trim or black with a shiny green trim, tri-band and packs 40Mb of internal memory. The unlocked handset Sony Ericsson K850 Blue 5 mega pixel camera with auto focus and Xenon flash produces true digital camera results. The K850 ringtones is also a capable multimedia phone.

Beyond the camera, the Sony Ericsson K850 Blue is also a capable multimedia phone. Scroll, sort and access your media from a single point in the menu. The Sony Ericsson K850 Blue Cyber-shot phone also allows you to carry out an intelligent search to see photos by the month they were taken, view thumbnail images or scroll through in full-picture mode. With the new crystal display, the cheapest mobile phone K850 offers optimal clarity from any viewing angle. A new media browser puts all stored media, whether photos, video, music or pod casts, in one place.

The Bluetooth mobile phone Sony Ericsson K850 features 5 Mega pixel camera with Xenon Flash and 16x digital zoom, a 2.2-inch QVGA LCD display, Bluetooth 2.0 and integrated media player. Sony Ericsson K850 Blue supports stereo music playback and comes packaged with a wired stereo headset. The cheapest mobile phone Sony Ericsson K850 Blue phone measures 102 x 48 x 17mm and weighs 118g. Sony Ericsson K850 has a GSM talk time of 9 hours and a standby time of 400 hours. Please purchase online www.luckywirelessusa.com

By: m.jeya