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  1. #1
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    Chris Rodriguez's Avatar
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    *STICKY* Official Cricket Home SID Thread

    From How Stuff Works:

    Cell Phone Codes


    Electronic Serial Number (ESN) - a unique 32-bit number programmed into the phone when it is manufactured

    Mobile Identification Number (MIN) - a 10-digit number derived from your phone's number

    System Identification Code (SID) - a unique 5-digit number that is assigned to each carrier by the FCC

    Cell-phone Codes

    All cell phones have special codes associated with them. These codes are used to identify the phone, the phone's owner and the service provider.

    Let's say you have a
    cell phone


    , you turn it on and someone tries to call you. Here is what happens to the call:


    • When you first power up the phone, it listens for an SID (see sidebar) on the control channel. The control channel is a special frequency that the phone and base station use to talk to one another about things like call set-up and channel changing. If the phone cannot find any control channels to listen to, it knows it is out of range and displays a "no service" message.
    • When it receives the SID, the phone compares it to the SID programmed into the phone. If the SIDs match, the phone knows that the cell it is communicating with is part of its home system.
    • Along with the SID, the phone also transmits a registration request, and the MTSO keeps track of your phone's location in a database -- this way, the MTSO knows which cell you are in when it wants to ring your phone.
    • The MTSO gets the call, and it tries to find you. It looks in its database to see which cell you are in.
    • The MTSO picks a frequency pair that your phone will use in that cell to take the call.
    • The MTSO communicates with your phone over the control channel to tell it which frequencies to use, and once your phone and the tower switch on those frequencies, the call is connected. Now, you are talking by two-way radio to a friend.
    • As you move toward the edge of your cell, your cell's base station notes that your signal strength is diminishing. Meanwhile, the base station in the cell you are moving toward (which is listening and measuring signal strength on all frequencies, not just its own one-seventh) sees your phone's signal strength increasing. The two base stations coordinate with each other through the MTSO, and at some point, your phone gets a signal on a control channel telling it to change frequencies. This hand off switches your phone to the new cell.



    As you travel, the signal is passed from cell to cell.

    Let's say you're on the phone and you move from one cell to another -- but the cell you move into is covered by another service provider, not yours. Instead of dropping the call, it'll actually be handed off to the other service provider.

    If the SID on the control channel does not match the SID programmed into your phone, then the phone knows it is roaming. The MTSO of the cell that you are roaming in contacts the MTSO of your home system, which then checks its database to confirm that the SID of the phone you are using is valid. Your home system verifies your phone to the local MTSO, which then tracks your phone as you move through its cells. And the amazing thing is that all of this happens within seconds.

    The less amazing thing is that you may be charged insane rates for your roaming call. On most phones, the word "roam" will come up on your phone's screen when you leave your provider's coverage area and enter another's. If not, you'd better study your coverage maps carefully -- more than one person has been unpleasantly surprised by the cost of roaming. Check your service contract carefully to find out how much you're paying when you roam.

    Note that if you want to roam internationally, you'll need a phone that will work both at home and abroad. Different countries use different cellular access technologies. More on those technologies later. First, let's get some background on
    analog cell-phone


    technology so we can understand how the industry has developed.




    I take no CREDIT whatsoever in this list.

    6441 Tulsa, OK
    06439 Tucson, AZ
    06425 Spokane, WA
    06415 Santa Fe, NM
    06371 Modesto, CA
    06365 Merced, CA
    06323 Hot Springs, AR
    06249 Albuquerque, NM
    06160 Utica-Rome, NY
    06005 Rochester, NY
    05945 Pittsburgh, PA also use for West Virginia
    05914 Omaha, NE
    05756 Lincoln, NE
    05618 Hickory-Lenoir-Morganton, NC
    05586 Greensboro--Winston-Salem--High Point, NC
    05582 Greeley, CO
    05540 Fort Collins-Loveland, CO
    05508 Evansville, IN
    05458 Denver, CO
    05450 Dayton-Springfield, OH
    05386 Charlotte-Gastonia, NC
    05361 Buffalo-Niagara Falls, NY
    05173 Wichita, KS
    05145 Fresno, CA / Merced, CA / Modesto, CA / Visalia-Porterville-Hanford, CA
    05111 Temple-Killeen, TX
    05105 Syracuse, NY
    05033 San Antonio, TX
    05027 Salt Lake City-Ogden, UT
    05019 Salem-Albany-Corvallis, OR
    04973 Reno, NV
    04961 Pueblo, CO
    04959 Provo-Orem, UT
    04945 Portland, OR
    04925 Pine Bluff, AR
    04923 Phoenix, AZ
    04857 Nashville, TN
    04849 Muskegon, MI
    04809 Memphis, TN
    04771 Macon-Warner Robins, GA
    04755 Louisville, KY
    04743 Little Rock, AR
    04733 Lexington, KY
    04729 San Diego, CA
    04717 Las Cruces, NM
    04712 Lansing, MI
    04693 Knoxville, TN
    04681 Kansas City, MO
    04667 Jonesboro-Paragould, AR
    04621 Houston, TX
    04567 Grand Rapids, MI
    04543 Fresno, CA
    04535 Fort Smith, AR
    04509 Fayetteville-Springdale-Rogers, AR
    04485 El Paso, TX
    04413 Columbus, GA
    04407 Colorado Springs, CO
    04395 Clarksville, TN-Hopkinsville, KY
    04391 Cincinnati, OH
    04381 Chattanooga, TN
    04343 Bryan-College Station, TX
    04325 Boise-Nampa, ID
    04279 Austin, TX

    Please feel free to contribute. I'll try to keep this list updated.

    I recently started to use SIDs. This didn't seem too important to me because I've never had a problem. I personally consider it just another tool in your arsenal.

    Additions from users:

    06528 Laredo, TX (Tri-Band) - wthigon
    06535 Baltimore, MD - Onelowzx6r
    06529 Donna,TX - oriax123
    06526 Brownsville, TX - lolopez999
    04982 Richmond, VA - blueteam2010
    04162 Albany, NY - SD550
    06549 Las Vegas, NV - Muhammad
    06527 Corpus Christi, TX Triband - w5pda
    06534 Chicago, Il Triband - notsew
    06534 Lake Villa (Chicagoland), IL - linsule




    Last edited by Chris Rodriguez; 10-28-2012 at 10:20 AM.
    Please check the forum and post there before PMing me. I have over 674 unread PMs due to the fact that they are issues which should have been addressed here.

    If you need to buy something from (Ebay), please use this LINK every time and support the forum!

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  3. #2
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    wthigon's Avatar
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    06528 Laredo, TX (Tri-Band)

  4. #3
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    06535 Baltimore, MD
    -Onelowzx6r

  5. #4
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    06529 Donna,TX

  6. #5
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    6526 brownsvilletx

  7. #6
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    Richmond Va 4982

  8. #7
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    louisville kentucky pleasure ridge park center tp be exact
    45525

  9. #8
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    hmm my phone works without this set but it would be nice to change it :-D anyone got this from the phoenix area

  10. #9
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    Albany, NY comes in at 04162

  11. #10
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    My phone is working without the correct sid, I'm using a phoenix sid in chicago. Phoenix was 4923. Anyone know a chicago sid?

  12. #11
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    does any one know san benito,tx sid

  13. #12
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    6539 or 06539 for Las Vegas, NV. (tri-band)

  14. #13
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    6527 Corpus Christi, TX Triband.

  15. #14
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    notsew's Avatar
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    06534 Chicago, Il Triband

  16. #15
    Junior Member
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    6534 Lake Villa (Chicagoland), IL - pulled from phone

 

 
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