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    • How to Restore a Blackberry to Factory Settings

      How to Restore a Blackberry to Factory Settings

      A Blackberry is a “smartphone” that integrates a phone, media player, email client, web browser, camera, and personal digital assistant (PDA) in a single device. It has many purposes and allows users to perform a number of tasks such as creating notes, accessing the Internet, and scheduling events. Blackberry phones represent over 14% of the

    • AMPS (EIA/TIA-553) and NAMPS (IS-91)

      AMPS (EIA/TIA-553) and NAMPS (IS-91)

      Mobile Frequency Range Rx: 869-894; Tx 824-849 Multiple Access Method FDM Duplex Method FDD Number of Channels 832 Channel Spacing 30kHz Modulation FM AMPS AMPS (Advanced Mobile Phone Service) was the first cellular mobile system in the United States. AMPS operates as an analog system using 30 kHz wide channels. NAMPS AMPS was later enhanced

    • IMEI (International Mobile Equipment Identity)

      IMEI (International Mobile Equipment Identity)

      Each GSM and UMTS mobile phone has a unique IMEI (International Mobile Equipment Identity) number. An IMEI number facilitates an important function – it easily identifies a mobile phone being used on a GSM (Global System for Mobile Communications) network. The IMEI is a useful tool to stop a stolen phone from accessing a network

    • How Do Prepaid Cell Phones Work?

      How Do Prepaid Cell Phones Work?

      A prepaid cell phone is one that allows users to pay in advance for their service without the commitment and penalties of a long term contract. While contract plans are still the most popular form of mobile phone service, prepaid cell phones have become very popular in recent years and have grown in use amidst

    • GSM (Global System for Mobile Communications)

      GSM (Global System for Mobile Communications)

      The Global System for Mobile Communications (GSM) system is a widely deployed digital mobile telephony standard that is deployed throughout Europe and other locations around the globe. The GSM standard leverages a variant of TDMA (time division multiple access) and is the most deployed of the three competing legacy digital wireless technologies on the market

    • How Cell Phone Tracking Works

      How Cell Phone Tracking Works

      Before GPS started being deployed in the majority of mobile devices sold on the market, the only method available to track a cell phone was triangulating the cell phone’s position using one of several techniques available to law enforcement and other governmental agencies. Today, most cell phone tracking applications work by accessing the GPS location

    • How Do I Locate My Lost Cell Phone?

      How Do I Locate My Lost Cell Phone?

      Many of us have lost our cell phones from time to time but some may have a harder time than others in retrieving their phone. What is worse is when you lose your cell phone in the middle of a texting session or when you have an important phone call to make and the person’s

    • iDEN (Integrated Digital Enhanced Network)

      iDEN (Integrated Digital Enhanced Network)

      An IDEN, or Integrated Dispatch Enhanced Network, is a radio service provided by some mobile telephones that allows subscribers to talk to nearby subscribers who have similar phones without dialing their individual numbers. IDENs are often provided as a free service on modern mobile phones, such as Nextel, or as a premium service that can

    • How to Change my PIN and PUK

      How to Change my PIN and PUK

      A PIN, or Personal Identification Number, is a number that is used on some SIM cards to prevent unauthorized use of the cell phone it is located in. PINs are not used by all SIM cards and may need to be setup before they can be used. A PIN is generally between 4 and 8

    • How to Find an IMEI

      How to Find an IMEI

      An IMEI, or International Mobile Equipment Identity, number is a number associated with a specific cell phone and can be used by authorities in a wide variety of countries to blacklist stolen cell phones, making them unusable to the thief, even if he/she replaces the phone’s SIM card. An IMEI number should not be confused

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