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What's a PRL? The Answer!

wingland Sprint Admin
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Attached is a 177 page document from the CDMA Standards body listing everything about your PRL.  Your PRL is the Preferred Roaming list in your phone and it can be updated over the air.  The attached document covers every technical detail about the PRL.

 

Excutive Summary:

 

 

The Preferred Roaming List (PRL) is a database that assists the mobile in the acquisition and selection of a serving CDMA network. The PRL is fundamental for operators since it is through the PRL that the home operator informs their mobile devices about systems that are permitted and any order of preference in the permitted systems and even about any systems that are prohibited.

 

 

 

 

Retrieved from

http://www.cdg.org/technology/cdma%5Ftechnology/tech%5Fref.asp

 

Message was edited by: wengla02

  • 1. Re: What's a PRL? The Answer!
    Newbie
    Currently Being Moderated

    for those of you who only speak english, this means that the list (PRL) tells the phone what carriers' towers to connect to, and in what order, if/when it is necessary to not use sprint signal.

  • 2. Re: What's a PRL? The Answer!
    bioangel Newbie
    Currently Being Moderated

    and in even more clear english. it means if you can hack it you can tell it too use the strongest tower no matter what.

  • 3. Re: What's a PRL? The Answer!
    cpcarroll Valued Member
    Currently Being Moderated

    I've been told that it isn't necessary and even not a good idea to update the PRL, at least not too often. So how do I know if/when I should do it? Where I live I don't have the best signal and from what Sprint support told me, there are only 2 towers in my area and last I heard (about 2 weeks ago) one of those wasn't even working.

  • 4. Re: What's a PRL? The Answer!
    halcyoncmdr123 Sprint Employee
    Currently Being Moderated

    cpcarroll71 wrote:

    I've been told that it isn't necessary and even not a good idea to update the PRL, at least not too often. So how do I know if/when I should do it? Where I live I don't have the best signal and from what Sprint support told me, there are only 2 towers in my area and last I heard (about 2 weeks ago) one of those wasn't even working.

    Maintaining an up to date PRL is not detrimental. There are times where a roaming agreement may change and without an up to date PRL you will get no service in that area at all, whereas if it were up to date you would be able to do everything. PRLs have no effect on native Sprint coverage, they are a list of the order a phone should try connecting to roaming towers. So if you lose Sprint signal, it would then look for Company A, then Company B, then Company C, etc. until it gets a usable signal. It then periodically checks back for a native Sprint signal again. All of the current Sprint phones automatically update their PRLs, some more often than others, nowadays you shouldn't have to manually check for a PRL update, running a version that is slightly old won't have an effect for 99% of customers, those that will be effected are only those in the areas where the changes were made since that old PRL.

  • 5. Re: What's a PRL? The Answer!
    cpcarroll Valued Member
    Currently Being Moderated

    Thanks. That clears it up some. So where Iive and spend most of my time I'm not roaming and I have the everything data plan too so do I even need to worry about updating the PRL manually? Is it something I should do when I'm traveling pretty far away from home?

  • 6. Re: What's a PRL? The Answer!
    Bronze Expert
    Currently Being Moderated

    Is there anything like the PRL for CDMA on the iDEN side?

     

    Once in awhile my phone drops calls a lot in a given area and the CS people do what they call "re-provisioning" on their end and walk me through a master reset/browser update on my iDEN phone, then it works OK again. Is that due to the iDEN equivalent of a PRL?

     

    If iDEN has the equivalent of a PRL, does that have anything to do wth the notorious Nextel "signal bouncing" in an area with multiple towers nearby? My experience has been that when standing outdoors in one place in clear weather in a low-density residential area, the signal constantly bounces from four bars to zero bars and all points between, which sound suspiciously like a problem mentioned in one of the previous posts in this thread, which was attributed to an out-of-date PRL.

     

    I know Nextel does not roam in the bulk of the US (certainly not here in California), so perhaps there is no iDEN "PRL". But if iDEN has something similar to the CDMA PRL, it might explain a lot.

     

    Any feedback will be much appreciated.

     

        - Nxtl4me

  • 7. Re: What's a PRL? The Answer!
    abadasstanker69 Newbie
    Currently Being Moderated

    You can update to any prl you want. You can get them here

    Also to answer your quesion iDEN was developed by motorola. Read about it here

     

    Message was edited by: abadasstanker69

  • 8. Re: What's a PRL? The Answer!
    petelee1 Newbie
    Currently Being Moderated

    I believe it is ALWAYS advisable to update your PRL when your phone or cell data modem advises you to do so.  It will, perhaps, make a difference if you're in an area with nominal coverage, as it's possible that a new tower has been added or a partnership agreement has since enabled sharing a tower with another provider (e.g., Verizon).

  • 9. Re: What's a PRL? The Answer!
    Tiemen Newbie
    Currently Being Moderated

    My Hero will not even perform a PRL update, instead presenting me with error 1012. Is that a concern?

  • 10. Re: What's a PRL? The Answer!
    JFizDaWiz Newbie
    Currently Being Moderated

    So PRL is to CDMA as PLMN is to GSM? I know a lot more about GSM technology since I work for AT&T (yet I have Sprint)

  • 11. Re: What's a PRL? The Answer!
    Servovicis Sprint Employee
    Currently Being Moderated

    JFizDaWiz wrote:

     

    So PRL is to CDMA as PLMN is to GSM? I know a lot more about GSM technology since I work for AT&T (yet I have Sprint)

    PRL for sprint would be like at&t's CARD profile. at&t employees can find that by searching CARD in your Customer Solutions Portal

  • 12. Re: What's a PRL? The Answer!
    jshull06 Regular Visitor
    Currently Being Moderated

    I would let you in on a little prl secret, but I'm sure my post would be deleted.  Hint google 00001 prl and read up.

     

    Message was edited by: jaceyshull

  • 13. Re: What's a PRL? The Answer!
    SWEETBRAT4U Newbie
    Currently Being Moderated

    Iden does not have a PRL because there is no roaming

  • 14. Re: What's a PRL? The Answer!
    Bronze Expert
    Currently Being Moderated

    re: "Iden does not have a PRL because there is no roaming"

     

     

    But even iDEN phones on occasion need to be "re-provisioned" on the network in order to be served properly by the network.

     

     

    When the "provisioning" is out of whack (as near as I can piece together, that means the identification numbers in the handset and in Nextel's customer/phone database don't match up), Nextel will keep booting the phone off the network, dropping calls, not allowing calls to go out, etc.

     

     

       - Nxtl4me

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