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    • 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

    • How to Block Incoming Calls

      How to Block Incoming Calls

      Blocking incoming calls can sometimes be quite important for many reasons. Someone may be troubling you over the phone, harassing you, giving blank calls and you just want to avoid a specific person. A simple way to do this is to block an incoming call of a specific person. That is, whenever that person calls

    • ABCD Tones

      ABCD Tones

      The ABCD tones are additional DTMF tones that may be used in any way the standard (0-9) tones are used. These tones are generated using a Silver Box. Engineers envisioned phones being used to access computers and other devices. This vision led to the addition of the number sign (#, sometimes called ‘octothorpe’ or ‘pound’)

    • 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

    • Numbers that always Ring Busy

      Numbers that always Ring Busy

      In the following listings, "xxx" means that the same number is used as a constantly busy number in many different prefixes. In most of these, there are some exchanges that ring busy and some exchanges that are in normal use. ALWAYS test these numbers at least three times during normal business hours before using as

    • How to Make a Lineman’s Handset

      How to Make a Lineman’s Handset

      This is the “right hand” of both the professional and the amateur lineman. Basically, it is a customized portable telephone which is designed to be hooked onto raw cable terminals in the field and used to monitor the line, talk, or dial out. The monitor function is usually the main difference between the “butt-in” test

    • 3GP

      3GP

      3GP is the standard used today on the 3G mobile phones. It is distinguished in two different standards; the 3GPP, which is used on GSM-based phones and have the file extension, .3gp. There is also the 3GPP2, which is for CDMA-based phones, and have the file extension .3g2. These two standards are MPEG-4 and H.263

    • Ground Start

      Ground Start

      What is Ground Start? Ground Start or GST is a signaling technique for telephony from a terminal, or a subscriber local loop, to a telephone exchange in which a party gets a dial tone by momentarily grounding one side of a (telephone) circuit. The Ring side of a wire pair is usually the side that

    • How Do I Connect My Bluetooth to My Cell Phone?

      How Do I Connect My Bluetooth to My Cell Phone?

      Before any connection can be made between the Bluetooth and the cell phone, it is important that they both have a strong charge. Typically when these devices begin to run extremely low on battery, the signal they emit is not as strong and that can result in a failed attempt at configuring a Bluetooth to

    • 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

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