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Mobile Technologies and Cellular Phones
What is a cellphone?
A cellphone is a mobile electronic telecommunications device that use radio waves to allow people the communicate dialing and receiving phone calls trought a wireless cellular network.
How a cellphone works?
The cellular network interconnected to the public phone system and is based on several telecom cells, called base station (cell sites) where the phones can connect.
The cell bases have a tower with antennas with a zone of coverage (usually from 0.8 to 13 kilometres), and the movil phones connect to the nearest base to make and receive calls.
Telecom and telephone networks
0G is the name used for the technologies of mobile telephone services that started in 1946
1G is the name of the first generation of cell phones introduced in the mid 1980's and use analog signals
2G Generation: In this mobile telephone systems the radio signals are digital. Note that both 1G and 2G, use digital signaling to connect the radio towers (which listen to the handsets) to the rest of the telephone system.
2G services are frequently referred as Personal Communications Service or PCS in the US.
2.5G services, which enable high-speed data transfer over upgraded existing 2G networks, are widely deployed worldwide.
2G technologies can be divided into TDMA-based and CDMA-based standards depending on the type of multiplexing used. The main 2G standards are:
GSM (TDMA-based), originally from Europe but used worldwide
iDEN (TDMA-based), proprietary network used by Nextel in the United States and Telus Mobility in Canada
IS-136 aka D-AMPS, (TDMA-based, commonly referred as simply TDMA in the US), used in the Americas
IS-95 aka cdmaOne, (CDMA-based, commonly referred as simply CDMA in the US), used in the Americas and parts of Asia
PDC (TDMA-based), used exclusively in Japan
GSM The Global System for Mobile Communications (GSM) is the most popular standard for mobile phones in the world. The GSM standard makes international roaming very common between mobile phone operators, enabling subscribers to use their phones in many parts of the world.
3G is the next generation designed to allow the transmission of very large quantities of data, is also becoming increasingly popular.
The services associated with 3G provide the ability to transfer both voice data (a telephone call) and non-voice data (such as downloading information, exchanging email, and instant messaging).
In marketing 3G services, video telephony has often been used as the flag-ship killer application for 3G.
The first country which introduced 3G on a large commercial scale was Japan. In 2005 about 40% of subscribers use 3G networks only, and 2G is on the way out in Japan. It is expected that during 2006 the transition from 2G to 3G will be largely completed in Japan, and upgrades to the next 3.5G stage with 3 Mbit/s data rates is underway.
GSM service is used by over 2 billion people across more than 210 countries and territories (2006).
Info and Whitepapers on Telecom/3G/CDMA 4G 5G
3G in Africa
Intro To 3G - All about 3G
Three - 3g website UK
- 3G Dating Agency Mobile Community
3G Doctor Healthcare Service
4G
4G future generation development has already started although its scope is not clear yet. Higher data speeds enable new services for subscribers, such as picture messaging and video telephony.
The dialogue between the handset and the cell site is a stream of digital data that includes digitized audio (except for the first generation analog networks). The technology that achieves this depends on the system which the mobile phone operator has adopted. Some technologies include AMPS for analog, and TDMA, CDMA, GSM, GPRS, EV-DO, and UMTS for digital communications. Each network operator has a unique radio frequency band.
Cell phones culture was extended worldwide in the past twenty years, thanks to the miniaturization and additional services as SMS text messages, or MMS graphic messages that allows to send photos and videos.
The sale of commercial ringtones exceeded $2.5 billion in 2004
The world's largest mobile phone manufacturers include Alcatel, Audiovox, BenQ-Siemens, Dopod, Fujitsu, Kyocera, LG, Motorola, NEC, Nokia, Panasonic (Matsushita Electric), Pantech Curitel, Philips, Sagem, Samsung, Sanyo, Sharp, SK Teletech, Sony Ericsson and Toshiba.
The world's largest mobile phone operators include Orange SA and Vodafone.
According to the CIA World Factbook the UK now has more mobile phones than people
Mobile phone use on aircraft is also prohibited, because of concerns of possible interference with aircraft radio communications
Cell phones controversies. Mobile radiations.
Health Risks : There are concerns about the effects on health from using a mobile telephone. There is some small amount of scientific evidence for an increase in certain types of rare tumors (cancer) in long-time, heavy users. More recently a pan-European study provided significant evidence of genetic damage under certain conditions. Some researchers also report the mobile phone industry has interfered with further research on health risks.
The World Health Organization Task Force on EMF effects on health has no definitive conclusion on the veracity of these allegations. (See also electromagnetic radiation hazard.) It is generally thought, however, that RF is incapable of producing any more than heating effects, as it is considered non-ionizing radiation; in other words, it lacks the energy to disrupt molecular bonds such as occurs in genetic mutations.
Driving concerns : Several studies have concluding that driving and talking trought a cell phone is very risky because increase the correlation with traffic accidents even when using hands free systems. Some research indicates that using mobile phones while driving poses the same risk as someone operating a vehicle while under the influence of alcohol.
Potential danger during electrical storms: There is evidence that mobile phone users suffer much more serious lesions than non-users, in case of being struck by lightning during an electrical storm.
Security concerns : Since early networks, the clonning of cell phones to listen private converstations was reported. Even the more recent systems as GSM have much more security, there still concerns about vulnerabilities that allow
SMS spoofing.
Also the cell phones was used in conjunction with bombs in the terrorist atacks in Madrid 2004 and London 2005 and others .
Mobile Phones - Directory and services
SMS Text Messages - SMS Text Messages Information Offers Instant Messenger services to increase the simplicity and ease of texting on phones or via standard e-mail. Free SMS Services
Mobile Phones Find - Find smartphones in mobile phone companies and technology stores. Compare plans or packages with internet, minutes, messages, whatsapp and social networks.
Which is the best mobile phone company Find?
Mobile phone companies Find offer a wide range of services and plans to meet the needs of consumers. Whether you need unlimited data, a family plan, an international plan or a prepaid plan, there is a mobile phone company that can meet your needs. It is important to compare the different options available to find the plan that is right for you.
Unlimited data plans
These unlimited plans are very popular for heavy data users, because they allow for unlimited web surfing, streaming, and social networks.
Find and compare some of the best unlimited data cell phone plans of 2023.
Prepaid plans
Prepaid plans require purchasing the service before using it, with various increments available.
Some of the best prepaid plans on the market.
Family plans
Family plans are also available from mobile phone companies Find. These family plans allow multiple people or mobile phone lines to be added to the same single account, often at a discounted rate. Find the best family cell phone plan.
What is the best mobile phone plan for a family?
It is considered the best overall and flexible family plan.
International plans
International plans are available for travelers who need to use their phones while abroad.
It is considered the best choice for travelers.
Prepaid plans
Prepaid phone plans are a type of mobile phone plan where you pay for the service in advance.
This helps to know exactly how much you will be spending on your phone bill each month, without any surprise overages.
Prepaid plans can be a great option for people who want to save money on their monthly phone bill, as they often offer lower rates than traditional postpaid plans.
What are the advantages of prepaid plans?
These prepaid plans offer a range of features and prices, so it’s important to compare your options to find the plan that best meets your needs.
There are prepaid phone plans available in all the mobile phone companies, as well as smaller carriers and mobile virtual network operators (MVNOs).
How do I know if a prepaid plan is right for me? Compare in the list of prepaid plans and options by company.
Some of the best prepaid phone plans include 15GB plan for $20/month, prepaid plan with the best coverage, unlimited data plan, and best prepaid deal. These plans offer a combination of low prices, good coverage, and useful features.
Prepaid phone plans can be a great option for people looking to save money on their monthly phone bill. There are many different plans available from a variety of carriers, so it’s important to compare your options to find the plan that best meets your needs.
What is the difference between a postpaid and prepaid plan?
The main difference between a postpaid and prepaid mobile plan is when you pay your bill. On a prepaid plan, you pay for your phone service upfront, while on a postpaid plan, you pay at the end of the month based on your usage.
Cell Phones
Find the latest cell phones : Samsung, iPhone, Motorola, Sony, Huawei, Honor, Xiaomi, Oppo, OnePlus, LG, Windows, ZTE, HTC, Nokia, Alcatel, Android and more.
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Phones Where to find the best cell phones ?
Search smartphones by brand, model and technical specifications. List of cell phones and plans in stores and mobile companies .
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Samsung - Models: Samsung Galaxy Z Flip, Fold, S23, A22, Edge, Plus, Mini, Note and other devices. The Samsung S23 Ultra is the new smartphone with a screen of 6,8 inches and 5 cameras, 200 MP wide + 12 MP ultrawide + 10 MP periscope telephoto 10x + 10 MP telephoto 3x + 12 MP front selfie camera. Includes 12 G of internal RAM memory and options with 256, 512 GB or 1 TB of storage. The 5000 mAh battery with fast charge and wireless power share technology.
iPhone - Apple. iPhone models : Plus, Pro, Max. - The iPhone 14 Pro Max display is 6.7 inches with a resolution of 2778 x 1284 pixels at 460 ppi. The operating system iOS 16. Includes 4 cameras, the main rear camera is 48MP + 12MP ultra wide + 12MP and a 12MP front camera with automatic focus. With 6GB of RAM Memory and Storage options with 256, 512 and 1 TB. Chip CPU A16 Bionic Hexa-core. Battery 4,323 mAh Li-Po with fast and Qi wireless charging.
Motorola - Moto - Models One Fusion Plus, G 5G Plus, Edge, RAZR, X Force, G9, G8, Droid. The Motorola Edge is a mobile phone wita display of 6.70 inches, a Qualcomm Snapdragon 765 processor of eight nucleus, and 4GB of RAM. Includes 3 cameras with 64 + 16 + 8 megapixels. The front camera is 25 megapixels, with f / 2.0. The 128 GB internal storage, can be increased with a microSD card (up to 1000 GB). IP54 protection against dust and water resistant. Runs with Android 10. The 4500 mAh battery accepts fast charge.
Xiaomi - Redmi, Note, Mi, Mi Max - The Xiaomi Mi 11 screen is 6.81 inches with a resolution of 1440 x 3200 pixels, the processor is a Qualcomm Snapdragon 888 with eight nucleus and 8GB of RAM. The operating system is with Android 11 OS. The 4.600 mAh battery with wireless and fast charge.
Huawei - P, Mate - The Huawei Mate 40 Pro Plus screen is 6.76 inches, the processor is a Hisilicon Kirin 9000 5G, with 12 GB RAM and a internal storage of 256 GB. Includes 5 cameras: 50+12+8+20+TOF 3D megapixels and runs Android 10.
Honor - Honor 50 smartphone screen is 6,57 inches (2340 x 1080), processor qualcomm snapdragon 778G, front camera 32mp and 4 cameras 108mp + 8mp + 2mp + 2mp, memory RAM 8 GB, storage 128 GB, battery 4300 mAh, Android 11 Operating System
OnePlus - The OnePlus 8T screen is 6.55 " (2400 x 1080 20: 9 120Hz AMOLED) - Processor: Snapdragon 865, RAM 12 GB Memory, Storage 256GB, Cameras 48MP f.1.7, Ultra-wide: 16MP f 2.2. Macro 5 MP + front 16MP f 2.4. Runs oxygen os 11 (Android 11) Operating System. The 4.500 mAh battery, 5G, Bluetooth 5.1, NFC, Dual SIM, stereo speakers Dolby Atmos, Dimensions 160,7 x 74,1 x 8,4 mm, 188 gr
LG - LG G - LG Velvet 2 screens of 6.80 inches. The processor is a Qualcomm Snapdragon 845 of eight nucleus. Internal Memory 6GB RAM. Runs with Android 10 OS. The 4300 mAh battery can be charged with the Quick Charge 4+ or wireless.
HTC - Ultra, Desire, One - The HTC U12 Plus screen is 6,00 inches with a resolution of 1440x2880 pixels, and a Qualcomm Snapdragon 845 octa-core of 2,8 GHz processor with 6GB of RAM. Runs Android 8.0 and the battery is 3500 mAh. The back camera is 12 Ultrapixels and 8 megapixels selfie front camera.
Sony - Sony Xperia L 4G LTE and 5G - Sony Xperia L4 is a smartphone with a 6.20 inches screen with a resolution of 720x1680 pixels. The processor is a MediaTek Helio P22 (MT6762) of eight nucleus with 3GB of internal RAM. Runs Android Pie OS. The 3580 mAh battery is fast charging.
ZTE - Blade Max, V8, V7, Axon 7, Pro - The Blade V8 includes 2 cameras and fingerprint reader. The best sound experience. High Quality Photos with the Bokeh effect.
Pixel made by Google models : Pixel 7 and 7 Pro. The Pixel 7 Pro display is 6.7" LTPO OLED, refresh rate of 120Hz, 3120×1440 QHD+ pixel resolution. Storage options of 128, 256, or 512 GB with internal RAM memory of 12 GB. The rear cameras are 50 MP sensor with f/1.85 lens, 12 MP ultrawide sensor with f/2.2 lens & 48 MP telephoto sensor with f/3.5 lens. The front camera is 11.1 MP sensor with f/2.2 lens and 92.8° field of view; Laser detect autofocus, optical image stabilization. The battery capacity is 5000 mAh non-removable with fast charging, wireless charging and reverse wireless charging. Uses the Google Tensor G2 processor. The operating system Android 13 OS. With Corning Gorilla Glass Victus and IP68 water and dust resistance.
Android - Android OS is an Operating System that runs in most smartphones. Last version is: Oxygen os 11 (android 11) and previous versions 10, Pie 9, Oreo 8, Nougat 7, Marshmallow 6, Lollipop 5, Kitkat 4.4, Ice Cream Sandwich 4, Honeycomb 3, Gingerbread 2.3, Froyo 2.2, Eclair 2, Android 1. You can update it, setup, configure, install apps and games from the Google Play Store.
Phones Mobiles 2024 Mark Zuckerberg announces the date that will end mobile phones and is clear about their replacement: "It will be like with computers" Marca.com
Mapping the ionosphere with millions of phones Nature.com
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Get 4 Free iPhone 16s With This Early Black Friday Deal From T-Mobile CNET
- Models: Samsung Galaxy Z Flip, Fold, S23, A22, Edge, Plus, Mini, Note and other devices. The Samsung S23 Ultra is the new smartphone with a screen of 6,8 inches and 5 cameras, 200 MP wide + 12 MP ultrawide + 10 MP periscope telephoto 10x + 10 MP telephoto 3x + 12 MP front selfie camera. Includes 12 G of internal RAM memory and options with 256, 512 GB or 1 TB of storage. The 5000 mAh battery with fast charge and wireless power share technology.
