Spy World Miami | GSM/GPRS

Go to content

Main menu



96 Miracle Mile Coral Gables, Florida 33134
[email protected]
USA Eastern Time hours 10 am to 7 pm Monday thru Saturday

  GSM and GPRS these two acronyms are well known in the world of mobile telephony, but you know what it’s the true meaning and how they work? Here we will give you a brief explanation of these two concepts.

The first system is the GSM (Global System for Mobile communications) it is a digital communications system most used today to transmit voice and data where it digitizes and compresses the information and the transmission takes place, assigning to each call a time slot, which allows multiple calls to simultaneously share the same channel without interfering with each other. This system operates in the bands 900 MHZ and 1800 MHZ in Europe, Africa and Asia and the bands 850MHZ and 1900 MHZ in the United States. The 850 MHZ band is also used for GSM and 3GSM in Canada, Australia and several countries in Latin America.

Let’s review a little GSM History

At the beginning of the 80’s the first systems of Mobile communications appeared in the world. Each nation developed its own system and a mobile phone worked only in the country in which it was purchased, due to that the technology of each country was not compatible among each other. That's why technology is called National.

In 1982, a consortium of European countries created the (Groupe Spéciale Mobile) GSM for develop a cellular technology that provides a common European mobile telephone service. Since the beginning the group had the idea that the new standard must use digital technology instead of the analog. The Group had to choose between the solution of narrowband or broadband and models of transmission or division frequencies. For this reason, they made several field tests to decide between narrowband or broadband standard. The solution chosen was the narrowband TDMA (Time Division Multiple Access).

The GSM technology revolutionized the area of the cell communication at the beginning of the 1990s. The need to achieve a uniform and standard network led different countries to jointly create a global network that will allow the users to perform various functions with their mobiles and not limiting them to simple calls. The first phase of the GSM network was launched in 1991, covering the main European cities and it was followed by several more the following year. In 1995 the second phase of the network added the sending of data, fax and video over GSM. The system had a great reception and was expanding by several countries of the world. It became clear that GSM would be a global technology and non-European. That’s why the meaning of GSM began to mean “Global System for Mobile communications”.

  GSM Services:

Entertainment Service

• Tv/Video - allows the user to see Tv programming on your mobile phone.

• Music - service of reproduction of music.

• Games - the user can access games using the phone´s network.

• Internet access - allows the user to Surf the Web.

• Location service - the user can knowing the exact position and places of interest.




  Voice Services

• Incoming calls management - offers to the user several options to handle the incoming calls.
• Message - after certain times the mobile sends voice message service within the call.
• Call transfer - allows to the user transfer incoming calls to another Mobile.
• Call barring – allows you to set that numbers can make calls.
• Show / hide numbers - The phone number is displayed in the phone that receives the call.
• "Push-to-talk" - allows the user to use your mobile as "walkie-talkies" communicating only with a group selected from your contact list.

Massage Services

• SMS - service to send and receive short text up to a maximum of 160 characters.
• MMS - service to send message of text, photos, video, audio or combination of the four.
• IM - instant message service sent in real time.
• E-mail - allows the user to have access to your e-mail account.

Video Service

• Video - Sharing live videos while maintaining a conversation.

On the other hand we find the GPRS technology this acronym are nowadays well known for all those users of mobile telephone services. Come from the words General Packet Radio Service and was a great innovation in the 80’s, and although today have already been replaced, are still used in areas where coverage of third and fourth generation (3G and 4G systems) is not been developed. GPRS is based on the GSM system for transmission of voice, which was a world revolution, by enabling contact via satellite, without cables or physical connection to a mobile terminals (GSM was designed to call second generation mobiles). Based on the GSM, in the same way that used the old modems connected to the telephone line, e-GPRS was born, a system that allowed to send and receive data packets using the telephone network by satellite.

GPRS (General Packet Radio Service) is a technology that remedied the deficiencies of GSM data transmission, introducing a switched network package that runs parallel to the switching of circuits of GSM.

GPRS appears as an evolution not traumatic in the current GSM network; it does not involve large investments and reuse part of the current GSM infrastructure. For this reason, GPRS has the same coverage as the current GSM network since its inception. The main objectives of this technology are:

• Keep the transmission equipment and the same interface radio to GSM.
• Achieving transmit data making faster the minimum changes in the existing GSM network.

The GPRS service, is aimed at applications with the following characteristics:

• Small transmission or large amounts of data (for example, interactive applications).
• Intermittent data burst transmission.


  Some examples of applications that meet these characteristics are:

• RTI (Road traffic informatics).
• Telemetry.
• Control of the railway traffic.
• Internet access using the world wide web(www).

Some features of GPRS are:

• Theoretical maximum 171.2 Kbps transfer rate.
• Permanent connection lower the second connection establishment time.
• Payment by the amount of information transmitted, not by connection time.



Some disadvantages of GPRS are:

• The network prevents the maximum speeds can be achieved.
• A channel that transmits this data may not be used for a normal phone call.
• The fact that packets travel separated may cause loss or damage during the transmission. Despite the protocol used, where these problems were anticipated and applied strategies of retransmission and integrity of packages, there may be delays in the receipt of the information.

Having these two technologies in a GPS Locator, this device allows to track via GPS signals. This means that it allows to send a coordinate by text message to a phone assigned where is the object or vehicle on a map, it is necessary to have inserted a SIM card on the telephone set.

How work a GPS/GSM/GPRS tracker

First, the GPS Locator is handled through a cell phone, a text message both for control and to receive notifications of the GPS Locator. Once the GPS Locator receives information or instruction of what they have to do, it will send a text message indicating the exact position in your GPS cell phone.


You can track vehicles, such as vans or trucks, and schedule actions such as limited a geographic area, stop the engine of the vehicle in case of theft, spies features in your vehicle. This is a device of small size that can be installed in hidden places inside his vehicle. As mentioned above the GPS device requires of a SIM card (chip) from any cell phone company. Connects to the vehicle power to keep operating by itself alone. Internal battery backup that serve up to 6 hours, even if the car wires have been cut.


• Location via GPS/GSM.
• Monitoring in Real time.
• It allows you to turn off the engine in case of theft via SMS.
• Notice of excess of programmable speed.
• Live microphone audio spy.
• Monitoring via Google Maps.
• Booking internal battery.
• Configuration of pager for message without PC or Internet.

If you are looking the best choice, a reliable alternative, you just have to come to Spy World Miami and you will find the best advices, the knowledge and support you need, call us to the number 305-542-4600, don’t forget to ask about our large quantity of articles that we have available for you, also you will find a great variety of services as the installation of GPS, as well as find a GPS device, these different devices are from last generation, therefore need real experts to help you to work optimally, remember you can get this type of services and more at Dadeland Cir,Kendale Lakes Blvd, Lakes by the Bay and many other places in all Miami, if you want to find a GPS Tracker of good quality and latest generation, your best option is to get to Spy World Miami, we work for you and your family safety.

Back to content | Back to main menu